Our site works best with JavaScript enabled.

Sonder Transmitter Long, low and slack plus-sized hardtail. A hooligan of a bike for trails centres, singletrack and UKs big mountains

Transmitter, fun defined and refined... Our original adrenaline fuelled 650b+ hardtail mountain bike, perfectly balanced up and down, across cambers, roots, rocks and ruts has had an update...
Transmitter still delivers on speed, pace and plus sized adventures but now features longer wheelbase, longer travel and longer reach.

Sonder Transmitter Frame Only

An alloy hard tail frame for the UK's big mountains, a blank canvas for building your dream all-mountain bike

£300.00
List Price: £349.00

Sonder Transmitter and Helm Fork

Buld up your dream hardtail mountain bike for fast ascents of the UK’s highest mountains, with the Cane Creek Helm Air fork

£999.00
List Price: £1199.00

Sonder Transmitter NX1 Recon

All mountain hardtail trail bike designed for trail centres and mountains with SRAM NX1, 1 x 11 groupset, Rockshox Recon fork and Love Mud Rumpus 650b+ boost wheels.

£999.00
List Price: £1199.00

Sonder Transmitter NX1 Revelation

All mountain hardtail trails bike designed for trail centres and mountains with SRAM NX1, 1 x 11 groupset, Rockshox Revelation fork, and Love Mud Rumpus 650b+ boost wheels.

£1299.00
List Price: £1549.00

Sonder Transmitter GX Eagle Revelation

Take this perfectly poised hardtail mountain bike to the next level for fast ascents of the UK’s highest mountains, with SRAM GX Eagle drivetrain and Rockshox Revelation forks.

£1999.00
List Price: £2349.00

Sonder Transmitter GX Eagle Pike

Perfectly poised alloy hardtail mountain bike with SRAMs new GX Eagle Drivetrain and Pike forks. There aren’t the words in the English language that can begin to express how good this bike is, you’ll just have to try it.

£2099.00
List Price: £2449.00

Sonder Transmitter GX Eagle Helm

Take this perfectly poised hardtail mountain bike to the next level for fast ascents of the UK’s highest mountains, with SRAMs new GX Eagle drivetrain and Cane Creek Helm Air fork.

£2199.00
List Price: £2599.00

Sonder Transmitter XX1 Eagle Pike

The ultimate Transmitter with the SRAM XX1 Eagle 1 x 12 groupset, RockShox Pike fork, and Love Mud Rumpus 650b+ boost wheels. This is a serious package designed for hard riding in the mountains or around trail centres.

£2799.00
List Price: £3299.00

The Hardcore northern design roots remain the same and mean Transmitter is still the bike for the toughest lines. Smash it down Jacob’s Ladder, slog up Garburn with no dabs… and be quicker than you’ve ever been on everything in-between.

Transmitter is one of the most capable hardtail we’ve ridden and is ready to take on proper mountain trails: Snowdon on a crisp winter day, Colorado singletrack with killer views and grinders where you’ll be glad of the 50 tooth… Yet, pad up and grab the full-facer and you can still take a day trip to Bike Park Wales or alternatively whip around Cannock Chase on a Sunday afternoon chasing your lycra clad mates.

The signature flattened top tube gives vertical compliance but lateral stiffness - it really is an all mountain bike. That long wheelbase combined with the slack front end, size specific chainstays and a lowered BB give stability and control through the rowdiest of terrain.

Transmitter is designed around Boost 148/110 standards and 650b 2.6/.8 tyres, and optimised for 1x groupsets. The geometry and extra grip from those big tyres means even the most sheepish rider will tackle those steep sections, up and down, like a pro.

Transmitter frames now feature internal cable routing through the downtube, integrated headsets, through-axle hubs, refined dropouts, butted tubes and smooth welds (and 3 shiny new colours).

Transmitter is a bike that just fits in with hard riding. This new version is still the fun trail bike it’s always been, and will still be a perfect partner for multi-day epics or short and fast trail centre blasts, but the changes we’ve made have raised the Transmitter’s limits, so you’ll be able to push the bike harder than ever before!

Dropper seatpost ready

The Transmitter frame is compatible with a dropper seatpost so even the most sheepish riders can tackle those steep sections head on like a pro.

Vertical compliance and lateral stiffness

The strikingly flattened top tube is the spoonful of black magic we need to make the frameset both rigid and forgiving in all the right places. Stable yet nimble, the geometry has been tweaked to give a spirited ride.

Internal cable routing

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

Wheel compatibility

Designed around Boost 148/110 standards and 650b 2.6/.8 tyres

Chain guide ready

​Transmitter can be fitted with a chain guide. (ISCG 05 compatible).

Hide features

Frame spec

Alloy hardtail trail bike frame

Weight: S: 2.0 kg; M: 2.03 kg; L: 2.07 kg; XL: 2.1 kg
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 150 mm (540 mm axle to crown) suspension forks
Internally routed cables
Boost 148 rear spacing to allow huge tyre clearance while benefitting from a stronger wheel
Threaded 73 mm BSA BB shell for no-creak assembly
Chainstay mounted disc brake for clean lines and damage protection
Reverb Stealth port
EN 14766 compliant
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

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
Medium
Riders between 5ft 6in and 5ft 10in
Large
Riders between 5ft 9in and 6ft 2in
X-Large
Riders of 6ft 2in +

Transmitter

Size Small Medium Large X-Large
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

Custom Options

We minimise the chopping and changing that makes so many other bikes a smorgasbord of bike parts. We spec Transmitter with pure NX1, GX Eagle or GX Eagle Helm ... and take pride in offering SRAM just as they designed and tested to work.

Check out the specs on the individual product pages. They are built to order and are fully customisable – if you want a different stem length, saddle, wheelset, bar or gear ratio then let us know. If you’ve a dream build in mind then please get in touch and we’ll do our best to source the parts you want.

All our bikes are built in-house, checked and signed off by Cytech trained mechanics before being despatched to you in a custom-made bike box.

Faqs

Support

Alpine Bond Warranty

We offer a 10 year guarantee on both our handmade titanium and Reynolds steel frames. Our hand welded 6061-T6 alloy triple butted frames and carbon frames come with a 5 year manufacturing defect warranty. All our bikes are built, checked and signed off by Cytech trained mechanics before being despatched to you in a custom-made bike box.

Kudos

Explore other content related to Sonder Bikes on our site.
08 03 2019 - Develop

New Sonder Transmitter: Q&A with Neil Sutton
We catch Sonder Bike Guru Neil to quiz him about the new Transmitter

15 02 2019 - News

Alpkit Keswick Official Opening
Yippee! It's officially official... We're open!

12 02 2019 - Daring Deeds

The Inaugural Tour of the Sonder Santiago
Grace and Rich take Sonder Satiagos on a Welsh tour

26 01 2019 - Daring Deeds

Huffing and Puffing: Strathpuffer Part 2
Pete let's us in on his Strathpuffer experience

25 01 2019 - Daring Deeds

Huffing and Puffing: Strathpuffer Part 1
Neil Cottam tells his tale from Strathpuffer 2019

01 01 2019 - Daring Deeds

Day Trip up the ‘Big Hill’
Rachael Crewesmith takes the Signal Ti for a spin

30 10 2018 - Daring Deeds

Wild About Argyll
Bikepacking the Wild About Argyll trail

30 10 2018 - Daring Deeds

A Serious Undertaking
A stormy start to a Cairngorm loop

17 10 2018 - Daring Deeds

Bear Bones 300
Kenny takes on the challenge of the Bare Bones 300

11 10 2018 - Daring Deeds

Project Grandmas
Cycling to grandmas

21 08 2018 - Spotlight

Supporting the Silk Road Race
Watching dots on the Silk Road

08 08 2018 - Daring Deeds

Athlete Adventures: Iceland National Trail
Ben Turner links the first Iceland National Trail