Sonder Transmitter Frame Only
The bike for the UKs big rideable mountains - an alloy 650b+ boost compatible hardtail trail frame. Buy the frame only - a blank canvas - and build your dream all mountain bike
Available on finance, from per month*
Pictures are for illustration and some components and finishing kit of this build may be different. Please refer to the detailed spec sheet before placing an order.
How To Order
All our bikes are built individually to order. If you want to change any part of the spec to suit your needs then get in touch.
Please allow 15 working days for us to build, check, pack and despatch your Sonder.
Alternative payment options
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|Alpkit Ltd acts as a credit intermediary and offer credit products provided exclusively by Klarna Bank AB (publ). Klarna Bank AB (publ) is Authorised by the Swedish Financial Services Authority (Finansinspektionen) and is subject to limited regulation by the Financial Conduct Authority. Details about the extent of our regulation by the Financial Conduct Authority are available from us on request. Finance is only available to permanent UK residents aged >18, subject to status, terms and conditions apply. Registered office: Sveavägen 46, 111 34 Stockholm, Sweden. Corporation ID number: 556737-0431.|
At A Glance
- Fast, agile trail centre and big mountain hard tail mountain bike frame
- Hand welded 6061-T6 triple butted frameset
- Vertically compliant laterally stiff tubing
- Dropper seat post compatible
- 650b+ boost compatible
Do you remember the enthusiams and energy riding your first mountain bike, to go where you shouldn’t, open up and really ride (fast)? The way you soared down the hill that would make your parents wince if they knew? The way you pedalled with gusto up the steep bits in anticipation of that flat and free reward at the top?
Transmitter; a perfectly poised 650b hardtail mountain bike with balance up and down, across cambers and ruts, roots and rocks.
Transmitter can take on those mountain trails guns blazing; Snowdon on a sunny Autumn day or the Colorado singletrack with killer views and grinders where you won’t get out the grannie-gear. Yet, you can still whip around Cannock Chase on a Sunday afternoon with great agility.
Striking flattened top tube gives vertical compliance but lateral stiffness; an all mountain bike that gives the stability of a fat-bike shrunk in the wash with the nimbleness of a trail bike. Utilising the new Boost148 and Boost110 standards, even the most sheepish rider will tackle those steep sections like a pro.
Clinically created, Transmitter frames feature external bolted cable solutions, integrated headsets, through-axle hubs, 1x gearing, formed butted smooth-welded tubing and as you would expect - handling beyond compare. They’re bikes that just fit in with hard riding. But mostly, they are to be rode and enjoyed. Easy to ride and maintain. And funner. Much funner.
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.
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.
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.
Tapered head tube
Whoever would choose to be a head tube? You might as well step into the ring with Mike Tyson. This is a critical junction point where force is distributed around the frame and steering precision is won or lost. Transmitter has a wide tapered head tube to house your internal bearings, distributing force more evenly whilst improving steering over broken terrain.
Transmitter is designed around the new Boost standard and corresponding 52 mm chainline for better steering stiffness and increased wheel support.
Chain guide ready
Transmitter can be fitted with a chain guide. (ISCG 05 compatible).
Transmitter is designed to run with 650b+ tyres at both ends.
Alloy hardtail trail bike frame
|Weight (kg): S: 2.0; M: 2.03; L: 2.07; XL: 2.1|
|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 130 mm suspension forks|
|Bolted cable guides for precision cable placement and retention|
|Durable anodised finish|
|Boost148 rear spacing for wheel strength and optimal chainline|
|Threaded 73 mm BSA BB shell for no-creak assembly|
|Chainstay mounted disc brake for clean lines and damage protection|
|Adventure cage compatible downtube mount|
|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|
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 +
|ST - Seat tube||395||445||470||490|
|TT - Top tube||593||622||642||659|
|HT - Head tube||110||120||120||130|
|HA - Head angle||65||65||65||65|
|SA - Seat angle||73||73||73||73|
|CS - Chainstay||425||425||425||425|
|BB - BB drop||42||42||42||42|
|FO - Fork offset||46/51||46/51||46/51||46/51|
|WB - Wheelbase||1139||1163||1183||1208|
|SO - Stand over||740||770||790||810|
|RE - Reach||410||430||450||470|
|SK - Stack||599||608||608||618|
Transmitter (Gunmetal only)
|ST - Seat tube||410||467||505|
|TT - Top tube||595||615||631|
|HT - Head tube||120||120||120|
|HA - Head angle||65||65||65|
|SA - Seat angle||72.5||72.5||73|
|CS - Chainstay||425||425||425|
|BB - BB drop||42||42||42|
|FO - Fork offset||42/51||42/51||42/51|
|WB - Wheelbase||1130||1150||1175|
|SO - Stand over||748||773||796|
|RE - Reach||406||426||446|
|SK - Stack||610||610||610|
|Frame||Sonder Transmitter, 6061-T6 Hand Welded Alumminium|
|Frame||S: 2.0 kg; M: 2.03 kg; L: 2.07 kg; XL: 2.1 kg|
|Headset not included with frame|
Swapouts and Upgrades
You can interchange Love Mud components on this build at no additional cost. So if you want a different length of stem, a particular saddle or bar then let us know in the notes section in the checkout and we'll get in touch. We also hold big stocks of SRAM, Rockshox, WTB and regular build with Shimano, Hope, Cane Creek. We'll build your Sonder with any part that suits your needs. Give us a call, with the same experienced mechanic helping throughout your build you know who to call if there's anything you want to know.
- What wheel sizes can Transmitter take?
- What pressure should I run my Trailblazers at?
- When will you get your bike?
- I’m between bike sizes - which size should I choose?
- Bike Frame and Build Weights
- What are builds and groupsets?
- Are Sonder available outside the UK?
- How much does international shipping for Sonder Bikes and Love Mud Wheels cost?
- Cycle to Work Schemes
- Try Before You Buy - Sonder Demo and Bike Hire
- Common Bike Upgrades: price list
- Which wheelset for which Sonder Bike?
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.
Sonder - a new bike brand from British outdoors experts Alpkit
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Sonder Transmitter First Ride Review Outdoors Magazine
Jon Doran test rides the Sonder Transmitter.
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PinkBike visit us at the London Bike Show
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