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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.

£1149.00 Was: £1299.00
List Price: £1549.00

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 SRAM NX1 Revelation Black - Black
  • Sonder Transmitter SRAM NX1 Revelation Black - Black
  • Sonder Transmitter SRAM NX1 Revelation Reef - Reef
  • Sonder Transmitter SRAM NX1 Revelation Rocket - Rocket
  • Sonder Transmitter SRAM NX1 Revelation Black - Black

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 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 15 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 hard tail mountain bike
  • Hand welded 6061-T6 triple butted frameset
  • Vertically compliant laterally stiff tubing
  • Rockshox Revelation RC, Solo Air, 130mm Travel
  • Dropper seat post compatible
  • Love Mud 650b+ boost wheelset with WTB Ranger tyres
  • SRAM NX1, 1 x 11 groupset

Transmitter: aggressive 650b hardtail mountain bike for taking on trails guns blazing; Snowdon on a sunny Autumn day or the Colorado singletrack. Yet, you can still whip around Cannock Chase on a Sunday afternoon with great agility.

A 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.

Boost 148 and 100, external bolted cable solutions, integrated headsets, through-axle hubs, formed butted smooth-welded tubing gives precise handling.

Transmitter is to ride and enjoy. 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.

Boost ready

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).

Wheel compatibility

​Transmitter is designed to run with 650b+ tyres at both ends.

Frame spec

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 +


Size Small Medium Large X-Large
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)

Size Small Medium Large
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
Build SRAM NX1, 1 x 11
Frame Sonder Transmitter, 6061-T6 Hand Welded Alumminium
Fork Rockshox Revelation RC, Solo Air, 130mm Travel
Rear mech Sram NX1 X-Horizon, 11 speed, Long Cage
Shifter Sram NX1 11 speed, X-Actuation
Chain Sram PC-1110
Cassette Sram PG-1130, 11-42
Chainset Sram NX1, 175mm
Chainring Sram 32t Steel X-Sync
Bottom Bracket Sram GXP XR
Handlebar Love Mud Aspect Riser, 780 mm wide
Headset Love Mud Rumour, Integrated Sealed Bearing, Tapered
Stem Love Mud Piskie, 40 mm
Spacers Love Mud (3x10 mm, 1x5 mm)
Tape/Grips Love Mud
Brakes SRAM Level
Rotors Avid Centreline (Front 180 mm, Rear 160 mm)
Seatpost Love Mud Membar, 31.6 mm
Seat clamp Love Mud Vice, 34.9 mm
Saddle Love Mud Abode
Rims Love Mud Rumpus 650b+ Boost Wheelset
Hubs -
Spokes -
Tyre Rear WTB Ranger 2.8 Comp
Tyre Front WTB Ranger 2.8 Comp
Tubes WTB Inner Tube, 27.5, 2.8-3.00
Frame S: 2.0 kg; M: 2.03 kg; L: 2.07 kg; XL: 2.1 kg
Built S: 13.3 kg; M: 13.8 kg; L: 13.9 kg; XL:13.9 kg
Pedals not included with full builds

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.

Click here for more information

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

Matt Orton previews the Sonder range at the Alpkit Big Shakeout festival and picks up on the strong underlying emphasis of equipment for adventure.

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Singletrack take a first look at the new Transmitter

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Sonder Transmitter First Ride Review Outdoors Magazine

Jon Doran test rides the Sonder Transmitter.

Read on Outdoors Magic

BikeRadar Check Out Sonder

Bike Radar come by the Sonder stand at the London Bike Show

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Bike Rumour review Sonder

US BikeRumour write up our first Sonder bikes

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What Mountain Bike 5* Transmitter

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Pink Bike Checks Out Sonder

PinkBike visit us at the London Bike Show

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Singletrack came by Sonder at the London Bike Show

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2 Reviews


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Fantastisk trail cykel

Helt fantastisk trail cykel. Den kan sendes gennem næsten hvad som helst med fuld gas. Jeg tror ikke man kan få en federe hardtail og prisen er absolut rimelig.

Superb hardtail, thats agile, responsive & forgiving over long distances

Having been a Specialized owner for several years, I succumbed to adopting a 650b+ bike after riding my Husband’s Sonder Transmitter (despite it being too big for me, I had an awesome time at Cannock Chase).

Used this excellent bike for the 2016 Rat Race The Crossing in July 2016. My Husband and I both had Sonder Transmitters (he had a Medium frame Transmitter SRAM GX1 Pike) on this adventure race and we were told that these were the first 650b+ bikes (of any make) to participate in the event since its inception.

I’m so impressed with the speed both on and off road (as a 70 mile day weaved and traversed over tarmac, rutted grasslands, thick mud, through thickly forested singletrack, climb loose gravel track and descending steep rocky trails). Handling the majority of sections with such ease that I could speed past those thin wheeled 27.5/29inch bikes with simplicity. Alpkit has done an amazing job on these bikes, as many “The Crossing” participants suffered mechanical issues, even countless more had tire issues, as we hammered the 200 mile, 3 day event across 3 National Parks. Our Transmitters had no issues whatsoever. 27.5+ is the way to go.

What was intriguing is the number of fellow participants who tested our Transmitters during the event. They were blown away with both bikes. Even the event mechnics where in awe. Some of these testers had high spec £5k full suspension bikes!

Alpkit had also lent me a beta test of their new womens specific seat. Another fantastic product especially compared to the mens seat (on my Husband’s Sonder)