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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.

List Price: £1199.00

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 Recon - Black
  • Sonder Transmitter SRAM NX1 Recon - Black
  • Sonder Transmitter SRAM NX1 Recon frame reef - blue - Reef
  • Sonder Transmitter SRAM NX1 Recon frame  rocket - green - Rocket

How To Order

Select Your Size And Colour From These Options:

Build option Small Medium Large X-Large
Black Buy now! Buy now! Buy now! Buy now!
Reef Buy now! Buy now! Buy now! Buy now!
Rocket Buy now! Buy now! Buy now! Buy now!

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.
'Buy Now' means your colour, size and all components are in stock and ready to go. You can buy it now.
'Building / Shipped from' means our next batch of frames is on its way and available for order. Placing an order guarantees a Sonder bike from our next batch. We'll build, check, pack and despatch your Sonder within 10 working days of this date.
'Sold out' means we're still confirming our next delivery and will be available to order shortly
'NA' means the size option is not available for this frame

  • Transmitter Frame

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

Alternative payment options

Guide to paying with Cycle to Work Schemes

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We act as a credit broker and not a lender and can introduce you to Close Brothers Retail Finance. Terms and Conditions apply. Finance subject to status. Applicants must be 18 or over and resident in the UK. Finance provided by Close Brothers Retail Finance, a trading style of Close Brothers Limited – a subsidiary of Close Brothers Group Plc. Registered Office: 10 Crown Place, London, EC2A 4FT.
At a glance
  • Fast, agile trail centre and big mountain aggressive hard tail mountain bike
    • Hand welded 6061-T6 triple butted frameset

    • Vertically compliant laterally stiff tubing
    • 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 with balance up and down, across cambers and ruts, roots and rocks.

    Transmitter takes on 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.

    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. Utilising the new Boost148 and Boost110 standards, even the most sheepish rider will tackle those steep sections like a pro.

    External bolted cable solutions, integrated headsets, through-axle hubs, NX1 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 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 +

New Transmitter

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

Original Transmitter

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 Recon RL 27.5+/29, Boost, 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
Rims Love Mud Rumpus 650b+ Boost Wheelset
Hubs -
Spokes -
Tyre Rear WTB Ranger 2.8
Tyre Front WTB Ranger 2.8
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

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.

Click here for more information

Alpine Bond Warranty

Our titanium frames are handmade and come with a 10 year frame warranty. 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.

Read on Bike Radar

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

Read on bikeradar

Bike Rumour review Sonder

US BikeRumour write up our first Sonder bikes

Read on BikeRumour

What Mountain Bike 5* Transmitter

Read on What Mountain Bike

Pink Bike Checks Out Sonder

PinkBike visit us at the London Bike Show

Read on Pinkbike

Single track Review Sonder

Singletrack came by Sonder at the London Bike Show

Read on Singletrack


7 Reviews


Used this product?

Write a review
Nick H

My wife wasn't all that impressed when I got back from my maiden Transmitter outing and proudly announced that "I'll probably kill myself using this bike". This bike is just so fun and easy to ride (once the saddle and grips were changed). Bombing down a rocky and rooty gully for the first time, the bike just took it all in it's stride, I couldn't quite understand why I hadn't already been ejected from the saddle. It made me feel like a much much better rider than I am grin.
This bike just feels so planted as well as being so playful.
The biggest change I made was changing out the chainring for a 28T (remember to buy a boost offset DM version). This gives me a real decent amount of climbing gears (giving me a range of 72.5 - 19 gear inches. Living at the foot of a mountain range this is very useful, as well as for bike packing).
So basically it descends really well, climbs very well and also is pretty handy on the flat (even on tarmac once the tyres have been inflated a bit more).
The SRAM gears work very well as do the brakes.
My only real niggle would be that you can only attach one bottle cage.
Finally my 8 year old son thinks it looks cool (and asked for one for xmas, not happening big man) and when out and about people are always staring at the bike.
All in all very pleased.

Transmitter XL

Bought the XL size and all good except as its winter the Ranger tyre was very vague first ride in the slop. Put a more aggressive front tyre on, went tubeless at the same time and now its brilliant. Love it, excellent machine floated over a horse rutted frozen bridleway while others on normal 27.5 tyres fell off constantly. Components seem good, gears, excellent with a good range. No complaints so far other than a more versatile front tyre as stock maybe.

Johnny DemonT
Sonder Transmitter in Rocket Green is an absolute Rocket

Ordered my Transmitter based on the rave reviews on Bike Radar... Could not be more blown away by the quality, price, and service from Alpkit! Nothing I test rode here in the states came close for the price!!! Had the bike shipped to the states problem free via DHL. Basically the bike arrived, I put the bars on, gave everything a pnce over (didnt need it), put the front wheel on, filled up the tubeless tires (small fee well worth it) and hit the trails! The Transmitter fit the bill exactly for what I was looking for in a bike. It is extremely playful, easy to throw around, and just goes and goes. The 27.5+ tires give confidence like no other on the corners and the geometry allows for a light front end feel. This bike will take me to the next level in my riding and has been and will be further recommended to those looking for the hands down best bang-for-your-buck trail hardtail around.

andy bev
silly / stupid fun

I know the title is strange a bit about me first I have ridden MTB's since 1987 and I have never ever ridden a bike which makes me chuckle so much it's a real hoot.
I did not want a Sram groupset but there is not much option and I was wrong the NX groupset works flawlessly
I wanted to uprate the forks but it got a bit complex on the c2w scheme wrong again the Sektors are brilliant.
I have always rebuilt any bike I have bought but I cannot fault the build of this bike these guys are good.
After I bolted the bars on I fitted a set of pedals and went for a spin what a laugh this bike makes you smile ( and thats what its all about really) I went to the local BMX track and laughed all the way round to some funny looks from the local kids with a 54 year old playing on there track but hey I was having a laugh!!!
I went to the Quantocks on sunday more laughing but this thing flies the 3" tyres roll quickly and are not at all draggy even at 15psi. the grip is amazing I was able to clear things which have in the past stopped me in my tracks.
point the thing down hill and it just flies but easily controllable and the grip and feedback is amazing.
needless to say I am stunned with this bike never have I laughed so much, you just have to try on to understand.
Now the negatives the grips are too big for me ( hardly a fault)
My Cotics will be resigned to the back of my shed

Awesome Bike

Had my NX1 build Transmitter now for about 3 months. Bought it after a fair time comparing it to various other bikes - Orange, Ragley and Whyte being the main 3 contenders for my cash but went with this because I trust Alpkit, it's designer knows what he is doing and the kit / build level was very competitive. It's a great bike. Love a hardtail - this bike gives you loads of feedback so you know exactly what each wheel is doing. Used all round Thetford and at Chicksands so far. Handles the technical stuff well and has no issues with the jumps, drop offs and trail features. So stable and yet still nimble. Climbs really well too which I'll benefit from when we hit Afan later this year. Still running tubes (20psi F&R seems to work well) and I've added a dropper, upgraded the grips, added V12s and Love Mud mud guard to protect the forks and headset and it looks great. Got the black frame version. Special mention to Neil the bike guru - answered all my questions about the bike before, during and even after purchase. Really pleased and 'yes" you can believe the reviews about this bike on-line. It's Awesome!

Just brilliant

I've had my transmitter about 2 months now and it's simply superb! I've not touched my other bikes at all since getting it. It really is as good as all the reviews on singletrack/ bikeradar etc say it is. And the service and advice from guru Neil is second to none. Thanks Alpkit.

T Ewart
Great Bike- But Bewarre

I bought this bike about 6 months ago. At first, it was awesome. The geo is awesome and it really can fly downhill. As time went on, the places where components are an issues showed. I've blown 2 freehub bodies, both replaced by Sonder no charge. Althought they replaced it for free, I feel as though these items shouldnt be messing up so quickly.

Another issue I had (and still dealing with) is that the rear DER hanger bolts continue to come lose, no matter how tight I crank them with blue locktite. When those start to vibrate lose, the entire rear assemble is not a solid unit which causes problems (like free hub bodies).

Lastly, the NX non drive side crank bolt came lose over time creating an unuasable crank. I replaced with a stronger GX unit.

If these problems havent come up, I'd love this bike. Perhaps because Im a big rider that these problems have come up, or maybe my bad luck. Who knows.