Ultra-capable 27.5" hardtail - fast, lively and precise. Cut trails like a scalpel. Transmitter flows across cambe...

Transmitter GX Eagle

Photos for illustration purposes. Please check the bike spec for detailed component listings.

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Transmitter GX Eagle

Aggressive 27.5" hardtail

€3.149

Aggressive 27.5" hardtail that holds the lairiest lines. SRAM GX Eagle 1x12 speed groupset, RockShox Pike Ultimate and Sonder Alpha 27.5" wheels.

Need help choosing a bike or technical advice?

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Buy Now. Be riding in 5 days.

Aggressive 27.5" hardtail that holds the lairiest lines. SRAM GX Eagle 1x12 speed groupset, RockShox Pike Ultimate and Sonder Alpha 27.5" wheels.

Buy Now. Be riding in 5 days.

Please select
size

Size
- Small
  Email when available
- Medium
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- Large
  Email when available
- X-Large
  Email when available
colour

Colour
- Nemo
  Email when available
- Plum
  Email when available
- Mango
  Email when available
- Charcoal
  Email when available
- Teal
  Email when available
- Chilli
  Email when available
- Tarmac
  Email when available
- Raw (PO Only)
  Email when available

Every Sonder bike is built to order so tell us exactly how you want it. Make any changes you want from the standard build and when you’re done, just hit “Add to bag” at the bottom of the page.

Handlebar

Sonder Aspect Riser 780mm
Sonder Aspect Riser [OEM]
In general riser bars tend to be wider than flat bars and may have slightly more flex to give a more forgiving ride. As you go into descents and your arms drop below your knees the additional height gained on your front end will help you take control of the steep descents.

That said you can get all bar types in a range of widths and stiffnesses and front end height can be adjusted with spacers like our Sonder Rings, so sometimes you just have to ignore the mumbojumbo and make your call on style and personal preference and there is nothing wrong with that.
Sonder Confucius
+€34,99
Sonder Confucius
Confucius says that you don't have to sacrifice what you love about your traditional riser bars just to get the flexibility of a hooped bar.

We have taken our Aspect risers and evolved them in to a bar designed primarily for bikepacking. You won't have to adapt to a new hand position so you are not going to lose any control off-road and you can still get out of your saddle and power up the hills like a hero.

If you do want to move your hands a bit a reduce the fatigue of a long ride, the hoop extends out front giving a choice of further hand positions. The bars also have a slight 'back sweep' so you can sit more upright in the saddle

The bars have a slight riser but feel free to experiment and rotate them to your suiting. Keep them horizontal, or twist them up slightly to give yourself a streamlined TT style riding position to help you battle across a windblown Tierra del Fuego.

Strength is not compromised as the main load bearing section of the bar is a single piece. Got gadgets? Confucius loves gadgets, and with the out-front hoop you can free up the bar around the stem. Simply attach your Garmin, 3000 lumen torches or mascots to the hoop and they will still be well within reach, maybe at an even better viewing angle and sit above your handle bar luggage.

Take your bikepacking into the mountains; Confucius is a bar that gives you more control than a tradional swept back bar on technical terrain.
Sonder Horizon Flat 720mm
+€0
Sonder Horizon Flat [OEM]
Flat bars help you keep the front end of your bike low, allowing you to get the weight over your front wheel when climbing and giving you more control in cornering.

Our flats have a 5˚ rise so technically we should call them flatish, but if you really need them to be totally flat just rotate in the stem clamp!

Saddle

Sonder Abode Black / 138
Sonder Abode [OEM]
High density foam padding over a plastic base provides comfort and longevity. A v-shaped split at the rear of the saddle allows flex as you are riding, increasing shock absorbancy and reducing pressure on the spot between your sit bones.

Scooped up at the back with a slight rise towards the nose the longitudinal profile provides a cupped, craddled seating position, a timeless, proven design for distance on and off the road or climbing in the mountains.

Stainless steel rails give 50 mm of forward and back adjustment to help you find your sweet spot.

All our Sonder bikes come with Abode fitted as standard.
Sonder Abode Black / 158
Sonder Abode [OEM]
High density foam padding over a plastic base provides comfort and longevity. A v-shaped split at the rear of the saddle allows flex as you are riding, increasing shock absorbancy and reducing pressure on the spot between your sit bones.

Scooped up at the back with a slight rise towards the nose the longitudinal profile provides a cupped, craddled seating position, a timeless, proven design for distance on and off the road or climbing in the mountains.

Stainless steel rails give 50 mm of forward and back adjustment to help you find your sweet spot.

All our Sonder bikes come with Abode fitted as standard.
Sonder Kura
+€44,99
Sonder Kura [OEM]
Adventure cycling is diverse; in the course of a single trip you can find km's of asphalt, traverse rutted grasslands, weave through thickly forest singletrack, climb loose gravel track or descend steep rocky trails.

It is unlikely you are going to find a single saddle position for all of this terrain. With this in mind Kura has a flat longitudinal profile with a gentle lateral curvature to give an extended saddle area, allowing you to position yourself around the saddle as you move between road, downhill, and climbing.

The honeycomb base reduces weight whilst still providing structure and support that adapts and flexes with your motion.

Titanium rails giving 50 mm of forward and back adjustment to help you find your sweet spot. Titanium is more forgiving than steel so provides a little more comfort.

Slightly wider than our Adobe saddle, it may provide additional comfort for riders with wider sit bones.
Sonder Zone 133 / Black
+€39,99
Sonder Zone [OEM]
The Zone is designed for maximum pedalling efficiency and comfort on longer rides, whether on road or off it.

Chromoly rails with suspension system

Cut-out shape relieves pressure

High density foam seat for comfort

We’ve selected a flat saddle profile that’s long enough to allow for lots of micro-adjustments to your riding position over the course of a full day on the bike. The nose width allows you to move forward over the pedals on climbs and sprints, and a tapered back enables you to get behind the saddle easily for switchback descents or technical off-road sections.

We’ve chosen a nylon fibre saddle base to provide a stiff and stable pedalling platform for a low overall weight. This base is connected to the chromoly rails using a patented suspension system that reduces road buzz and improves comfort without compromising on support.

High density foam stays comfortable for longer, adding to the saddle’s supportive platform. And a long central cut-out in the middle of the Zone relieves pressure on the perineum, allowing you to ride for longer.

Seatpost

X-Fusion Manic Drop Seatpost and Lever 31.6mm / 170mm
X-Fusion Manic Drop Seatpost and Lever
The X-Fusion Manic Dropper has been designed to work well across cross-country, trail, all mountain and enduro riding.

It works on a simple design. Inside you’ll find a closed cartridge that is both sealed and designed to be easily removable from the rest of the post. Simple construction aside, the action of this post feels super-smooth and silky.
RockShox Reverb / 150mm Drop / 31.6 x 440mm
+€64,99
RockShox Reverb / 150mm Drop / 31.6 x 440mm
The RockShox Reverb provides effortless actuation and increased reliability featuring new Vent Valve Technology.

With reduced overall post lengths and new travel options, riders of all shapes and sizes benefit from more travel than ever before. The Reverb Stealth is just really, really reliable at simply going up and down.
RockShox Reverb / 125mm Drop / 31.6 x 390mm
+€64,99
RockShox Reverb / 125mm Drop / 31.6 x 390mm
The RockShox Reverb provides effortless actuation and increased reliability featuring new Vent Valve Technology.

With reduced overall post lengths and new travel options, riders of all shapes and sizes benefit from more travel than ever before. The Reverb Stealth is just really, really reliable at simply going up and down.

Stem

Sonder Piskie / 31.8mm / 35mm
Sonder Piskie [OEM] /
Sonder Piskie / 31.8mm / 45mm
Sonder Piskie [OEM] /
Sonder Talo 35
+€49,99
Sonder Talo
Talo is a sturdy CNC machined aluminium performance mountain bike stem with four bolt clamp to hold your bar firmly in place.

Opposing bolts on the steer tube clamp give extreme clamping power while reducing stress on the steer tube. Machining shaves unnecessary weight to specifically engineer it for trail and all-mountain riding.

It's built for the trail and stiff for its weight to give precise and immediate handling.

compatible with all 31.8mm handlebars and 28.6mm steerer tubes

0° rise

6061-T6 aluminium construction

Weighs just 127g (35mm length)

Available in 35mm and 45 mm lengths

The humble stem has a significant effect on your bike's geometry and as a result its performance and your comfort. A shorter stem results in faster handling and a more upright riding position. Longer stems increase reach with slower more predictable handling.

Experiment with different length stems or get a pro bike fit to hone your perfect set-up.

Note. The length of a stem isn’t its overall length, from the very front to the very back, but the distance from the central point on the steerer tube and the centre of the handlebar.

Sonder Talo 45mm
+€49,99
Sonder Talo
Talo is a sturdy CNC machined aluminium performance mountain bike stem with four bolt clamp to hold your bar firmly in place.

Opposing bolts on the steer tube clamp give extreme clamping power while reducing stress on the steer tube. Machining shaves unnecessary weight to specifically engineer it for trail and all-mountain riding.

It's built for the trail and stiff for its weight to give precise and immediate handling.

compatible with all 31.8mm handlebars and 28.6mm steerer tubes

0° rise

6061-T6 aluminium construction

Weighs just 127g (35mm length)

Available in 35mm and 45 mm lengths

The humble stem has a significant effect on your bike's geometry and as a result its performance and your comfort. A shorter stem results in faster handling and a more upright riding position. Longer stems increase reach with slower more predictable handling.

Experiment with different length stems or get a pro bike fit to hone your perfect set-up.

Note. The length of a stem isn’t its overall length, from the very front to the very back, but the distance from the central point on the steerer tube and the centre of the handlebar.
Forks

RockShox Pike Ultimate RCT3 27.5 / 150mm
RockShox Pike Ultimate RCT3
Tubes

WTB Inner Tube / 27.5 / 2.8-3.0
WTB [OEM] Inner Tube / 27.5 / 2.8-3.0
Tubeless Tyre Upgrade and Setup
+€49,99
Tubeless Tyre Upgrade and Setup
Go tubeless
Bottle cages

No Bottle Cages (none)
No Bottle Cages
Sonder Buzz Wire Single
+€5,99
Sonder Buzz Wire
The easiest and most convenient way to carry water on your bike, a classic cage design that holds your water bottle nice and snug.

Buzz Wire is reassuringly durable, weighs just 65 grams and will carry your 500 or 750 ml water bottle with ease.

If you are on expedition and looking for a way to pass a rest day make a bent wire loop and challenge someone to a game of Buzz Wire!
Sonder Buzz Wire Pair
+€10,99
Sonder Buzz Wire
The easiest and most convenient way to carry water on your bike, a classic cage design that holds your water bottle nice and snug.

Buzz Wire is reassuringly durable, weighs just 65 grams and will carry your 500 or 750 ml water bottle with ease.

If you are on expedition and looking for a way to pass a rest day make a bent wire loop and challenge someone to a game of Buzz Wire!
Sonder Sideblade Black / Left Entry
+€6,99
Sonder Sideblade
The Sideblade bottle cage not only gives your water bottle a lovely, secure hug, but its side loading system makes it easier to access when you need a drink, making staying hydrated a joy even when you've got a load of frame bags to work around!

The Side blade is geared at letting you get to your water when you've got a bike packed up with frame bags, this means that it's also ideal for compact and full-sus frames where a standard loading bottle cage system just won't fit, you can choose which side you'd like to access your bottle by with a twist of the cage in the mount before your ride.

Made of polycarbonate, the Sideblade is also super light and super duper tough - hooray!

Mudguards

No Mudguards (none)
No Mudguards
Sonder Fender Front MTB
+€5,99
Sonder Fender
The Sonder Front Fender protects you from excessive mud splatter on wet, mucky trails. These lightweight plastic mudguards don’t require any special fixings on your bike and can be strapped straight onto your forks with 4 cable ties (supplied).

Made from durable polypropylene, if the Fender does meet its end, it can be easily recycled by most councils or at your local recycling centres.

Pedals

No Pedals (none)
No Pedals
Sonder Reko
+€59,99
Sonder Reko
The Reko are lightweight SPD pedals designed gravel riding and cross-country mountain biking over longer distances.

The Reko's platform-free design reduces the overall weight of the pedals to 145g per pedal for lighter, faster riding. Double-sided SPD bindings are easy to clip in and out of and their compact design means they're less likely to clog with muck on filthy winter rides.

The clip-in design improves the efficiency of your pedal strokes, saving energy on long rides and improving power transfer on climbs, and gives you more control of the back end of the bike.
Sonder Slingshot Black
+€74,99
Sonder Slingshot
The wide platform Slingshot pedal is designed to provide the support, control and confidence you need for a variety of riding, whether on trail, gravel or road.

Wide 87x90 platform made from 6061 aluminium

Double-sided adjustable SPD clips

Chromoly axle with sealed bearings

The Slingshot's wide foot platform provides plenty of support to the foot for more comfortable pedalling over long distances, reducing hot-spots. This additional foot support also gives you greater control of the rear end of the bike on tight turns or technical trail.

If you're using the Slingshot for mountain biking, the pedal's wide surface gives you a platform to stand on unclipped, ready to bail out if needed, on heart rate-quickening sketchy sections.

With double-sided SPD clips and a large pedal area, the Slingshot is easy to clip in and out of in a hurry. A clipless system provides greater pedalling efficiency when climbing and more control when descending.

Initial Price: €3.149
Extras: €0
Total Price: €3.149

Description
Features
Build Spec
Geometry and Sizing
Frame Spec
Reviews
Kudos

Description

Ultra-capable 27.5" hardtail - fast, lively and precise. Cut trails like a scalpel. Transmitter flows across cambers, roots, rocks and ruts. Get speed, agility and masses of fun with a long wheelbase, long trail and long reach. Then ask why anyone buys full suspension.

At a glance

Sram GX Eagle 12-speed groupset
Rockshox Pike Ultimate fork
Sonder Alpha 27.5" wheelset
6061 aluminium frame
X-Fusion Manic dropper seatpost

SRAM GX Eagle

SRAM Eagle drivetrains are designed, engineered and manufactured to work as complete drivetrain systems. Its 1x drivetrain is built to be lightweight, strong and intuitive, with the gear range to ride on any terrain.

GX Eagle provides the best choice of materials and finish options and remains fully compatible with SRAMs Eagle groupset.

Sonder Alpha 27.5"

Alphas are our performance 27.5" wheelset for big hits and big tyres. Whether you're riding down Top Chief at Fort William or riding the black routes at Bike Park Wales, Alphas will consistently spin up to speed and keep rolling to help you ride with fluid precision over the trails.

Alpha's have a boost hub for strength and stiffness and wide rims to improve tyre performance. They're built for abuse with sealed bearings and are tubeless ready.

Read less

Features

Progressive geometry

Long reach, low bottom bracket and slack 65° head angle for bucket loads of confidence. 425mm short chainstays for agility and insane acceleration out of turns.

Hand welded 6061-T6 triple butted frameset

Not all tubes are equal. Transmitter uses tube walls of different thicknesses to get material where it is needed and save weight where it isn’t.

Internal cable routing

Clean lines and tidy cables thanks to fully guided internal routing.

Huge tyres. Endless grip.

27.5" 2.6/2.8" tyres. Designed around Boost 148/110 standards.

Features built for trails

Compatible with a dropper seatpost so even the most sheepish riders can tackle those steep sections head on like a pro. Transmitter can aslo be fitted with a chain guide. (ISCG 05 compatible).

Loads of travel

150mm of suspension floats you over the roughest and rootiest lines.

Build Spec

Frameset
Frame:	Transmitter Frame \| 6061 aluminium
Fork:	RockShox Pike Ultimate \| 150mm (travel)
Headset:	FSA Orbit C-40-ACB

Groupset
Shifters:	SRAM GX Eagle Trigger \| 1x \| 12-speed
Brakes:	SRAM G2 R \| Hydraulic \| Post Mount
Rotors:	Avid Centreline \| 180mm (front), 160mm (rear) \| 6-bolt
Rear derailleur:	SRAM GX Eagle \| Long cage \| 12-speed
Chainset:	SRAM GX Eagle DUB \| 170mm \| 32t
Cassette:	SRAM XG1275 Eagle \| 10-52t \| 12-speed
Chain:	SRAM GX Eagle \| 12-speed
Bottom bracket:	SRAM DUB \| BSA \| 73mm

Wheelset
Wheels:	Sonder Alpha 27.5" UK Made
Front tyre:	Goodyear Escape Tubeless \| Black \| 27.5 X 2.6
Rear tyre:	Goodyear Escape Tubeless \| Black \| 27.5 X 2.6
Tubes:	WTB \| 27.5 x 2.8-3.0"

Finishing kit
Handlebars:	Sonder Aspect Riser \| 780mm
Stem:	Sonder Piskie
Seatpost:	X-Fusion Manic \| 31.6mm
Saddle:	Sonder Abode
Grips:	Sonder Clutch \| Black

Weight
Frame:	S: 2.1kg; M: 2.2kg; L: 2.25kg; XL: 2.3kg
Build:	S: 13.35kg

Pedals not included with full builds
Specifications are subject to change without notice

Geometry and Sizing

Sizing

It is important to get the right size bike, if the bike fits it will be faster, more comfortable, and easier to handle. You can also take into consideration the standover height to ensure you pick a bike that will be a good fit. If you measure your inside leg and ensure there is a minimum of an inch from the toptube to your crotch this will give you enough seatpost adjustment to find your optimum saddle height.

Generally we recommend:
Small: Riders between 5ft 2in and 5ft 7in (157-170cm)
Medium: Riders between 5ft 6in and 5ft 10in (167-177cm)
Large: Riders between 5ft 9in and 6ft 2in (175-187cm)
X-Large: Riders of 6ft 2in + (187cm)

Transmitter

Size	Small	Medium	Large	X-Large
ST - Seat tube	410	440	470	485
TT - Top tube	580.5	602.9	622.9	646.5
HT - Head tube	105	115	115	130
HA - Head angle	65	65	65	65
SA - Seat angle	75	75	75	75
CS - Chainstay	425	425	427.5	430
BB - BB drop	52	52	52	52
FO - Fork offset	46	46	46	46
WB - Wheelbase	1141.2	1165.5	1188	1216.8
SO - Stand over	749.7	768.4	782.6	796.6
RE - Reach	422.5	442.5	462.5	482.5
SK - Stack	589.4	598.4	598.4	612

Frame Spec

Alloy hardtail trail bike frame

Weight: S: 2.1kg; M: 2.2kg; L: 2.25kg; XL: 2.3kg
Alloy trail frame with integrated tapered headset for a clean, low front end
Hand welded 6061-T6 triple butted frameset
High-quality extended welds
Optimised for 150mm (540mm axle to crown) suspension forks
Internally routed cables
Boost 148 rear spacing to allow huge tyre clearance while benefitting from a stronger wheel
Threaded 73mm BSA BB shell for no-creak assembly
Chainstay mounted disc brake for clean lines and damage protection
Reverb Stealth port
EN 14766 compliant
Headset: IS42/28.6 \| IS52/40
The Transmitter frame is suited to a low profile 2.8” tyre or aggressive 2.6” tyres, some larger 2.8”s may rub the chainstays in use

Reviews

Kudos

Bike Radar Transmitter Review

A great blend of swaggering, speed-breeding stability sharpened up by instantly reactive, traction-chasing, short stem steering .... Alpkit resets expectations with its new hardtail.

Read the full review here.

MBR Review the Sonder Transmitter

"With slackest head angle, longest reach and shortest stem, the Sonder Transmitter is built for bombing, inspiring confidence to fully attack descents."

Read the full review here.

Off Road.cc Review Sonder Transmitter NX Eagle

The Transmitter is a playful, all-mountain rig with some hooligan tendencies. It suits all manners of riding from trail centres to more natural riding to exploring wild bridleways. If you want a ‘one-hardtail-does-it-all’ then the Transmitter will do that in spades.

Read the full review here

Singletrack take a first look at the new Transmitter

If you’re a numbers nerd or geometry geek you’ll recognise that while these are significant changes, they aren’t all that extreme and should result in a well rounded riding machine rather than something that only rides in one direction.

Read the full review here.