Signal St XT

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

Signal St XT

Steel aggressive hardtail 29er mountain bike


A fast and aggressive steel 29er hardtail trail bike with XT 12 speed groupset and Rockshox Recon fork: the bike that inspires confidence on fast flowy trails and big mountains

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Orderbook opens February for delivery in August.


The Signal is for flat out speed.

It pedals like an XC bike, descends like an enduro bike, and captures the rawness of riding a hardtail on fast, flowy singletrack. Stand up, sprint, and ride it hard on the groomed trails at Llandegla and Glentress or take it to big mountains and let loose.

At a Glance
  • Frame: Signal  4130 Chromoly, Hand Welded Steel frame
  • Forks:  Cane Creek Helm MK2 Air / 29 / 130mm
  • Groupset: Shimano XT / 1 x 12 / 10 x 51
  • Brakes: Shimano XT M8120
  • Wheelset:  Sonder Alpha 29 / XD
  • Tyres: Vittoria Mazza / TNT / 29 / 2.4 front, 2.35 rear

That low BB and long wheelbase gives a planted and stable feel through the corners and when tackling high speed descents. The low stack height leaves you with less of that ‘tall’ 29er feeling – you’ll feel like you’re 'in' the bike, not on the bike.

Big wheels roll faster. The 29" wheels can be paired with 2.2 to 2.6in tyres with clearance for winter conditions.

The Signal Steel rides beautifully – it’s got that distinctive steel feel to take the edge off the biggest hits while keeping stiffness where it counts so you can accelerate out of corners and track accurately through rocks and roots.

Why XT?

Shimano drivetrains are designed, engineered and manufactured to work as complete drivetrain systems. Shimano's new microspline hub means that you can run a 10 tooth cassette for a huge gear range. The new EV shifters and brakes provide loads of adjustment to get the perfect position as well as a rock-solid feel on the bars. And the 4-pot brakes provide consistent and reliable stopping power.


Aggressive trail geometry

​Neil has designed the Signal St to suit his aggressive riding style. A low bottom bracket makes it corner like its on rails, a spacious reach gives you room to move around on the bike, and the 66/74 head and seat angles give you the confidence to bomb the descents and while still being able to climb like a mountain goat.

Steel Frame

Nothing feels quite so good as the famously springy and durable Steel. Signal St’s 4130 Chromoly, Hand Welded Steel tubing absorbs shock to soften the ride without any loss to feel or speed.

2.6” tyre clearance

​Bucketloads of clearance for 2.6” tyres gives you the benefits of higher volume tyres without getting clogged up in UK conditions.

Build Spec
Build Signal St XT
Frame: Signal St Frame
Fork: Cane Creek Helm MK2 Air / 29 / 130mm
Headset: FSA Orbit C-40-ACB Headset / 7.8mm Spacer
Seat Clamp: Sonder Gromit / 34.9mm
Group Set
Brake Front: Shimano XT M8120 Brake / Right / 1000mm
Brake Rear: Shimano XT M8120 Brake / Left / 2000mm
Rotor Front: Shimano RT66 Rotor / 6 Bolt / 180mm
Rotor Rear: Shimano RT66 Rotor / 6 Bolt / 160mm
Rear Mech: Shimano XT M8100 Rear Derailleur / 1 / 12
Rear Shifter: Shimano XT M8100 Shifter / 12 / Direct
Chainset: Shimano XT M8100 Crankset / 170mm / 32t
Bottom Bracket: Shimano MT800 Bottom Bracket / BSA
Chain: Shimano SLX Chain / 12 / 120
Cassette: Shimano XT M8100 Cassette / 12 / 10-51t
Finishing Kit
Stem: Sonder Piskie / 31.8mm / 45mm
Seatpost: X-Fusion Manic Drop Seatpost and Lever / 31.6mm / 125mm
Saddle: Sonder Zone / 133 / Black
Tape/Grips: Sonder Clutch / Black
Handlebar: Sonder Aspect Riser
Wheels: Sonder Alpha 29 / XD
Front Tyre: Vittoria Mazza / TNT / 29 / 2.4
Rear Tyre: Vittoria Martello / TNT / 29 / 2.35
Tubes: WTB Inner Tube / 29 / 1.9-2.3
Frame: S: 1.97 kg; M: 2.0 kg; L: 2.1 kg; XL: 2.14 kg
Built: S: 12.4 kg; M: 12.65 kg; L: 13.8 kg; XL: 13.9 kg
Pedals not included with full builds
Geometry and 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:
Riders between 5ft 2in and 5ft 7in
Riders between 5ft 6in and 5ft 10in
Riders between 5ft 9in and 6ft 2in
Riders of 6ft 2in +
Size Small Medium Large X-Large
ST - Seat tube 400 425 465 485
ETT - Effective Top Tube 585 606 634 664
HT - Head tube 100 105 115 125
HA - Head angle 66 66 66 66
SA - Seat tube angle 74 74 74 74
CS - Chainstay 425 425 430 435
BB - BB drop 65 65 65 65
FO - Fork offset 42/51 42/51 42/51 42/51
WB - Wheelbase 1127 1149 1183 1220
SO - Standover 730 738 760 772
RE - Reach 420 440 465 495
SK - Stack 601 606 615 624
Frame Spec
Steel 29er hardtail mountain bike frame
Weight: S: 2.94kg; M: 3.1kg; L: 3.17kg; XL: 3.24kg
4130 Chromoly, Hand Welded Steel frame
148 mm boost thru axle standard
Clearance for 2.6” tyres
IS42.IS52 headset to give low stack height
73 mm BB shell
External cable routing for brake and gear cables
Stealth dropper routing
31.6 mm seatpost diameter, 34.9 mm clamp
Optimised for 130 mm travel suspension fork (42 or 51 mm offset)