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Sonder Frontier Trail orientated rigid aluminium all-rounder. Compatible with 29" and 650b+ wheel sizes.

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Sonder Frontier frame only

Adventure hardtail frame.


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Sonder Frontier frame and fork

Alloy frame and fork to build up your own 29er or 650b+ bikepacking dream machine


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Sonder Frontier NX1 Rigid Hobo 29er

Alloy adventure hardtail with SRAM NX1 1 x 11 groupset, Sonder rigid fork and Love Mud Hobo 29er wheelset.


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Sonder Frontier NX1 Rigid Rumpus 650b+

Alloy adventure hardtail with SRAM NX1 1 x 11 groupset, rigid fork and Love Mud Rumpus 650b+ wheelset.


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Sonder Frontier NX1 Recon Hobo 29er

Alloy adventure hardtail with SRAM NX1 1 x 11 groupset, Recon fork and Love Mud Hobo 29er wheelset.


Pre Order

Sonder Frontier NX1 Recon Rumpus 650b+

Alloy adventure hardtail with SRAM NX1 1 x 11 groupset, Recon fork and Love Mud Rumpus 650b+ wheelset.


Trail orientated rigid aluminium 29er complete with the boosted big-wheel benefits of increased traction, clearance, stability and playfulness. Take it to a trail centre and go for a new lap record or load it up with bags and ride it across a country.

Tailor Frontier to the way you ride with a fully rigid or short travel suspension fork and range of 1x drivetrains. Kit out with bikepacking soft luggage or rack up for more traditional bags.

Wherever you are in the world - squeezing in an afterwork loop or halfway through an adventure of a lifetime; Frontier eats up long distance trails with style and comfort with the shameless enthusiasm of a trail centre hardtail.

Frontier frame and fork are £299 and complete bikes start from £879.

Arrange a demo at our Nottingham factory store or test ride over a weekend for £39 a day plus £30 delivery and return shipping.

Omni-wheel friendly 29/650b+ aluminium bikepacking adventure bike.

Frontier is our new aluminium jack of all trades - ride it hard around the trail centre, load it up and sneak off for a midweek bikepacking trip through mid-Wales, pocket your passport and continue around the world.

The geometry is relaxed for long day comfort but its no slouch. The 6061 aluminium frame provides a durable and stiff chassis giving a responsive kick as you demand power when the slope steepens or enjoy feedback and precision through the corners.

Frontier can be tailored to ride how you want it to ride. If fully rigid is not for you the geometry and head angle allows capacity to take a 100 mm fork. So you can have it set up for XC race speed or all day plod comfort and put in the miles. Big tyre clearance gives you the choice of 27.5+ or 29in wheelsets. QR Boost 141 mm rear spacing provide the benefit of stronger, stiffer and more efficient wheels.

Optimised for 1x drivetrains, Frontier is available in NX1 builds with rigid or suspension forks.

Frontier excels both loaded and unloaded, absorbing every surface you ride - you decide how you want to pack for your adventure. With full rack mounts at the back and multiple boss mounts on the fork Frontier is an adaptable offroad explorer. Responsive when loaded up in the modern lightweight bikepacking style of travel, it is more than happy for a set of panniers to be thrown over it.

Whether you are in the world - squeezing in an afterwork loop or halfway through an adventure of a lifetime; Frontier eats up long distance trails with style and comfort with the shameless enthusiasm of a trail centre hardtail.

Aluminium frame

The 6061 aluminium tubing is durable, light and stiff.

Wide tyre clearance

Extra width between the chainstays gives you the choice of running 27.5+ tyres up to 3 inches or 29 inch tyres up to 2.4 inches.

Boost axle width

The Frontier frame is designed around QR Boost 141 mm rear spacing providing the benefit of stronger, stiffer and more efficient wheels. Chainstay mounted disc brake for clean lines and damage protection.

Rack mount ready

Responsive when loaded - Frontier is more than happy to shoulder a rack mount.

Hide features

Frame spec

Frame Key Features
6061 Aluminium frame
Optimised for rigid or 100 mm suspension forks
Internal cable routing
QR Boost 148 rear spacing for wheel strength and optimal chainline
Fork built around QR Boost 110 mm spacing
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
Full rack mounts and multiple boss mounts on rigid fork
Clearance for 3 inch 650b+ or 2.5 inch 29er tyres
Reverb Stealth port
EN 14766 compliant

Sizing

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. Generally we recommend:

Small
Riders between 5ft to 5ft 7in
Medium
Riders between 5ft 5in to 5ft 10in
Large
Riders between 5ft 7in to 6ft 2in
X-Large
Riders between 5ft 9in to 6ft 4in
Size Small Medium Large X-Large
ST - Seat tube 380 430 480 520
TT - Top tube 566 602 622 647
HT - Head tube 110 130 130 150
HA - Head angle 68 68 68 68
SA - Seat angle 73 73 73 73
CS - Chainstay 435 435 435 435
BB - BB drop 50 50 50 50
FO - Fork offset 51 51 51 51
WB - Wheelbase 1089 1127 1147 1174.5
SO - Stand over
RE - Reach 390 420 440 460
SK - Stack

Build Options

We minimise the chopping and changing that makes so many other bikes a smorgasbord of bike parts. We spec Frontier with pure NX1 and take pride in offering SRAM just as they designed and tested their componentry to work.

Check out the specs on the individual product pages. They are built to order and are fully customizable – 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

Our titanium frames are handmade and come with a 10 year frame warranty. Our hand welded 6061-T6 alloy triple butted 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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