Top Fuel Gen 4

Where can I find information regarding hardware, cable routing, parts compatibility, min/max, and replacement service parts?

Please visit the Service Manual. This document covers questions not already covered on the bike product page or in the Service Manual.

Service Manual

What’s new about the frame from the previous generation?

- Carbon and alloy frames are approx. 220g lighter
- New 4-position Mino Link at the lower shock mount adjusts geometry and leverage rate
- Updated storage door with a larger opening, tighter seal, and new BITSbag system
- Improved dropper insertion
- Can run a longer shock to increase rear travel to 130mm (stock 120mm)
- Fork approved for up to 140mm (stock 130mm)
- Can also run 120mm fork and lighter parts for a more XC feel

Is it compatible with other wheel/tire sizes?

Yes. M and larger bikes come with 29” wheels front and rear, but can be set up with a 27.5” rear wheel with the bike in the “high” Mino position and a fork with 140mm of travel.

Size S bikes come with 27.5” front and rear wheels to give these riders a more proportional fit and easier handling. These bikes are not compatible with any other wheel sizes.

In which Mino Link position does the bike ship?

“Low” setting for geometry, and “less progressive” setting for leverage rate.

Is it compatible with aftermarket shocks? Which ones?

YES. Fox Float, Float X. Rockshox Deluxe, Super Deluxe, Super Deluxe Flight Attendant, SIDLuxe, and SIDLuxe Flight Attendant. Others may fit but should be checked for clearance at full travel.

Can I use a shock with a longer stroke to increase the rear travel?

YES. The stock shock is 185x50mm, but can fit a 185x55mm to increase travel by 10mm to 130mm in the rear.

Do any frame sizes feature curved top tubes for lower standover?

Yes, the small features a curved top tube.

What sizes are compatible with a water bottle?

ALL sizes have 1 water bottle mount, and the small fits a short bottle All sizes fit the 21oz bottle, ML-XL fit the 26oz bottle, optimized around the side load cage.

Which models come tubeless? Which models need additional parts?

ALL models come out of the box setup tubeless.

Does it have any frame storage, hidden tools, or other neat accessories?

Say goodbye to the neoprene roll-up BITS bag. Carbon Top Fuel models will include the NEW 2-bag BITS system which features 1 bag to fit your spare tube in and the other bag for your tools. Alloy models will come with the new tool BITS bag, but the frame has plenty of room in the downtube for the tube bag as well if you wanted to purchase it separately. The frame also has a larger opening so you can get the bags in and out easier. Under the top tube there is an accessory mounting point as well if you want to store a tool or tube outside of the downtube.