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.
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...Read more
GX Eagle provides the best choice of materials and finish options and remains fully compatible with SRAMs Eagle groupset.
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.
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.
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.
Clean lines and tidy cables thanks to fully guided internal routing.
27.5" 2.6/2.8" tyres. Designed around Boost 148/110 standards.
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).
150mm of suspension floats you over the roughest and rootiest lines.
|Frame:||Transmitter Frame | 6061 aluminium|
|Fork:||RockShox Revelation RC | 150mm (travel)|
|Headset:||FSA Orbit C-40-ACB|
|Shifters:||SRAM GX Eagle Trigger | 1x | 12-speed|
|Brakes:||SRAM Code 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|
|Wheels:||Sonder Alpha 27.5" UK Made|
|Front tyre:||WTB Vigilante | Comp | 27.5 x 2.8"|
|Rear tyre:||WTB Trail Boss | Comp | 27.5 x 2.6"|
|Tubes:||WTB | 27.5 x 2.8-3.0"|
|Handlebars:||Sonder Aspect Riser | 78cm|
|Seatpost:||RockShox Reverb | 31.6mm | 150mm (drop)|
|Grips:||Sonder Clutch | Black|
|Frame:||S: 2.1kg; M: 2.2kg; L: 2.25kg; XL: 2.3kg|
|Pedals not included with full builds|
|Specifications are subject to change without notice|
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 Medium: Riders between 5ft 6in and 5ft 10in Large: Riders between 5ft 9in and 6ft 2in X-Large: Riders of 6ft 2in +
|ST - Seat tube||410||440||470||485|
|TT - Top tube||581||603||623||647|
|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||1144||1169||1191||1220|
|SO - Stand over||750||768||783||796|
|RE - Reach||422||442.5||462.5||482.5|
|SK - Stack||589||598||598||612|
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|
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.
"With slackest head angle, longest reach and shortest stem, the Sonder Transmitter is built for bombing, inspiring confidence to fully attack descents."
Author: Rachael Gurney
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.
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.