Our site works best with JavaScript enabled.

Sonder Frontier Frame And Fork

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

£249.00 Was: £299.00
List Price: £349.00

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.

  • Stirling Moss - Stirling Moss
    Stirling Moss
  • Chilli - Chilli
    Chilli
  • Nemo - Nemo
    Nemo

How To Order

Select Your Size And Colour From These Options:

Build option Small Medium Large X-Large
Chilli Buy Now! Buy Now! Buy Now! Buy Now!
Nemo Buy Now! Buy Now! Buy Now! Buy Now!
Stirling Moss 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

  • Frontier 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

Close Brothers Logo
Spread the cost of your purchase show details...
Finance Option
Item Price
Order Administration Fee
Purchase Price
Deposit
Deposit to Pay
Amount of Credit
Finance Term
Monthly Payments
Total Amount Payable
APR Representative
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
  • 6061 aluminium frame and rigid Boost fork
  • Relaxed riding position for comfort and performance
  • Hydraulic disk brakes compatible
  • QR Boost 141mm rear spacing
  • Rear mudguard and pannier rack mounts
  • 650b+ and 29” wheel size compatible

Frontier is our multi-activity

hardtail mountain bike. Ride hard at the trail centre, load it up for a midweek bikepacking trip, pocket your passport and continue around the world. With full rack mounts at the back and multiple boss mounts on the fork, Frontier is an adaptable off-road explorer.

The geometry is for long day comfort but it’s 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.

Available as a fully rigid or with 100 mm suspension fork. Set it up for XC race speed or for all day big mile comfort.

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.

Internal cable routing

Clean lines and tidy cables thanks to internal routing. Frontier also incorporates routing for a dropper seat post.

Aluminium frame

The 6061 aluminium tubing is durable, light, low maintenance 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. Seatstay mounted disc brake for clean lines and damage protection.

Pannier ready

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

Frame spec

Frame Weight (kg): S: 1.7; M: 1.8; L: 1.86; XL: 2.0
Fork Weight - uncut (kg): 1.0
6061 Aluminium frame
Optimised for rigid or 100 mm suspension forks
Internal cable routing
QR Boost 141 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

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 2in and 5ft 7in
Medium
Riders between 5ft 6in and 5ft 10in
Large
Riders between 5ft 9in and 6ft 2in
X-Large
Riders 6ft 2 and over
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 Frame and Fork
Frameset
Frame Sonder Frontier
Fork Sonder Frontier Fork
Heatset not included with frame and fork
Weight
Frame S: 1.7 kg; M: 1.8 kg; L: 1.86 kg; XL: 2 kg
Fork 1.09 kg

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.


Swapouts

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.

Upgrades

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.

Kudos

Reviews
No Rating

Used this product?

Be first to review