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Sonder Transmitter Carbon XX1 Eagle Pike

All mountain carbon hardtail trail bike designed for trail centres and mountains with SRAM XX1 Eagle 1 x 12 groupset, Rockshox Pike RCT3 fork, and Love Mud Rumpus 650b+ boost wheels.

List Price: £3899.00

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.

  • Sonder Transmitter Carbon XX1 Eagle Raw - Raw
  • Sonder Transmitter Carbon XX1 Eagle Raw - Raw
  • Sonder Transmitter Carbon XX1 Eagle Reef - Reef
  • Sonder Transmitter Carbon XX1 Eagle Rocket - Rocket

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.

  • Transmitter Carbon Frame

  • 1. Select Size

    Please select a size. See the fitting guide for size information

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    2. Select Colour

    Please select a colour. If your desired colour is not available, you can request a Stock Alert and you will be emailed when the product is either back in-stock or on pre-order.

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Please allow 10 working days for us to build, check, pack and despatch your Sonder.

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At a glance
  • Fast, agile trail centre and big mountain hardtail mountain bike frame
  • Vertically compliant laterally stiff carbon frameset
  • Dropper seat post compatible
  • Love Mud 650b+ boost wheelset with WTB Ranger tyres
  • Rockshox Pike 650b+ boost forks
  • SRAM XX1 Eagle, 1 x 12 groupset

About this build
The SRAM XX1 Eagle groupset has a 1 x 12 drivetrain. Rockshox Pike fork and 650b+ Rumpus wheelset with Boost 148 hubs for stronger, stiffer and more efficient wheels.

Transmitter Carbon DNA

The Transmitter Carbon is long, low, slack and fun.

We’ve taken what we’ve learned from the original alloy Transmitter and evolved the geometry, we’ve extended the reach and the long and low wheelbase gives stability and control at high speed.

We’ve shortened the seat tube length to allow longer drop seat posts and give better stand over clearance, the 73-degree seat tube angle and the plus size tyre specific design means it also climbs really well and makes the most of any traction.

The same slack (65-degree) head angle is designed around a 120mm fork and a 40mm stem. When combined with short seat stays and that flattened, longer top tube you get an agile and confidence inspiring ride whether riding steep mountain trails or shredding the local woodland singletrack.

Transmitter Carbon makes best use of available technologies. Boost 148/110 standards and bolt through hubs mean a stiffer and more responsive ride. 650b+ tyres on a tubeless compatible wheelset mean loads of grip and control, whether climbing or descending.

We’ve stuck with a standard threaded BB because we think it works better for where we ride, year round.

Transmitter Carbon frames are designed around 1x specific groupsets and feature internally routed cables, integrated headsets, stealth dropper routing and a single set of bottle bosses.

The Transmitters are bikes that just fit in with hard riding. But mostly, they are to be ridden and enjoyed. Easy to ride and maintain, fast and lots of fun.

Vertical compliance and lateral stiffness

A striking, flattened top tube gives vertical compliance and lateral stiffness, striking the perfect balance between agility and stability.

Extended reach

Transmitter Carbon is an evolution of our original alloy Transmitter. We’ve made a few tweaks here and there, and extended the reach to enhance stability at higher speeds.

Fully guided internal routing

Clean lines and tidy cables thanks to fully guided internal routing. Transmitter Carbon also incorporates a neat Reverb Stealth port for a dropper seat post.

Boost 148-specific design

Transmitter Carbon is designed around Boost 148 standards and 650b+ tyres, even the most sheepish rider will tackle those steep sections like a pro. Seatstay mounted disc brake for clean lines and damage protection.

Precision engineering

Long wheel base, slack head tube, low belly, and room for plus size tyres.

Wide tyre clearance

Extra width between the chainstays lets you run 27.5+ tyres up to 2.8 inches.

Obsessive detailing

Precision decals, a choice of raw carbon finish, and 2 painted colourways.

Frame spec

Weight (kg): S: 1.18; M: 1.2; L: 1.23
Carbon trail frame compatible with integrated tapered headset for a clean, low front end
Optimised for 130 mm suspension forks
Fully guided internal routing
Painted or raw carbon finish
Boost 148 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
Bottle cage 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 you well 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
Size Small Medium Large
ST - Seat tube 395 445 495
TT - Top tube 593 622 636
HT - Head tube 110 120 120
HA - Head angle 65 65 65
SA - Seat angle 73 73 73
CS - Chainstay 425 425 425
BB - BB drop 42 42 42
FO - Fork offset 46/51 46/51 46/51
WB - Wheelbase 1139 1163 1183
SO - Stand over 740 765 795
RE - Reach 410 430 450
SK - Stack 599 608 608
Build SRAM XX1 Eagle
Frame Sonder Transmitter Carbon Frame
Fork RockShox Pike RCT3 27.5+ Boost MaxleLite 15 mm
Headset Love Mud Rumour, Integrated Sealed Bearing, Tapered
Seat clamp Love Mud Vice, 34.9 mm
Group set
Brake Front SRAM Guide RSC
Brake Rear SRAM Guide RSC
Rotor Rear Avid Centreline 160 mm
Rotor Front Avid Centreline 180 mm
Matchmaker Clamps MMX Clamp Right
Rear mech SRAM XX1 Eagle
Shifter Rear SRAM XX1 Eagle
Chainset SRAM XX1 Eagle
Bottom Bracket SRAM GXP
Chain SRAM XX1 Eagle
Cassette Sram XG 1299 Eagle
Finishing Kit
Stem Love Mud Piskie, 31.8 mm
Seatpost RockShox 125mm Drop Reverb Seatpost 31.6mm 390mm
Saddle Love Mud Abode
Tape/Grips Love Mud Grabby
Handlebar Love Mud Aspect Riser, 740 mm
Wheels Love Mud Rumpus 650b+ boost MTB wheelset
Tyres Rear WTB Ranger TCS Light Fast Rolling 27.5 x 3.0
Tyres Front WTB Ranger TCS Light Fast Rolling 27.5 x 2.8
Tubes WTB Inner Tube Presta 27.5, 2.8-3.00
Frame S: 1.18 kg; M: 1.2 kg; L: 1.23 kg
Built TBC
Unfortunately we haven't been able to weigh these bikes yet, please bear with us and we'll update this page as soon as we can
Pedals not included with full builds

The build kits we use are tried and tested. It's stuff we know just works together. But if you want to change any part of the spec ... no matter how small ... then get in touch. Any change is no problem. Working with you to create dream bikes means we've built some pretty special bikes along the way.


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 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 and we will help spec and build a Sonder. With the same experienced mechanic helping throughout your build you know who to call if there's anything you want to know.

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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.


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