Spacer answer, straight up
For a 10-speed cassette on a Mavic HG freehub, use the 1.85 mm spacer only, not both the 1.85 mm and 1 mm spacers. Start by checking that your cassette and freewheel body match, then proceed with installation planning as needed.
The Mavic Freewheel Body is designed to match both the freewheel mechanism of your wheel and the cassette that fits your bike’s drivetrain. It’s available for several Mavic freewheel mechanisms—like ID360, ITS4, and FTS-L—and for cassette standards including Shimano HG, XD, XD-R, Microspline, Campagnolo ED, N3W, and Singlespeed.
That means you'll want to confirm your HG setup matches the cassette you're installing. If the cassette does not appear to fit correctly, double-check compatibility before proceeding. A mismatch may affect compatibility, so it's worth confirming the standards before installing.
When you start with the right freewheel body for your wheel and cassette standard, you are building from the correct interface. If you want a second set of eyes before wrench time, a Gearhead® Expert can help you sort through the setup.
Why the freewheel body matters
The Mavic Freewheel Body is all about compatibility at the source. It is made to cover multiple Mavic freewheel mechanisms—ID360, ITS4, and FTS-L—along with a wide range of cassette standards including Shimano HG, XD, XD-R, Microspline, Campagnolo ED, N3W, and Singlespeed. That broad coverage matters because cassette fit is not just about the cassette itself; it starts at the hub interface.
Less guesswork, cleaner installs
When the freewheel body matches both your wheel mechanism and drivetrain standard, installation gets simpler. Instead of trying to solve fit issues with extra parts and crossed fingers, you are working from the correct foundation. That helps you start with the correct interface for your wheel mechanism and cassette standard.
- Multiple mechanism support helps you match the wheel side correctly.
- Multiple cassette standards helps you match the drivetrain side correctly.
- HG-specific options keep Shimano HG builds on the right track.
Built for drivetrain matching
This is the kind of component that earns its keep before the first pedal stroke. Get the interface right by matching the freewheel mechanism and cassette standard. That is the cleanest way to choose the freewheel body that fits your setup.
How to choose the right setup
Before deciding on a spacer combination, identify two things: your wheel’s freewheel mechanism and your cassette standard. That is the whole ballgame. The Mavic Freewheel Body lineup is organized around those two fit points, so choosing the right one starts with knowing whether your wheel uses ID360, ITS4, or FTS-L, and whether your drivetrain calls for Shimano HG or another cassette interface.
A quick compatibility checklist
- Confirm the wheel mechanism. Check whether your hub uses ID360, ITS4, or FTS-L.
- Confirm the cassette standard. Make sure your drivetrain is using Shimano HG if that is the route you are building around.
- Install only after the interface matches. Confirm interface compatibility first before choosing a freewheel body or related setup parts.
If you skip those checks, it is easy to chase the wrong fix. Spacer decisions make more sense once the core fit is correct.
When to get a second set of eyes
If the cassette fit feels questionable, this is a smart moment to loop in a Gearhead® Expert. A quick compatibility check can save a lot of wrenching, and a lot of colorful language, later. Bike builds should be satisfying—not a riddle with tiny aluminum rings.
Why shop this at Backcountry
Bike parts are small, but the details are not. When you are sorting out freewheel body and cassette compatibility, the right answer is usually the one that keeps your setup clean and ready to ride—not the one that adds more guesswork. That is why Backcountry keeps the focus on gear that matches the job.
If you are piecing together a drivetrain and want a sanity check before the lockring goes on, a Gearhead® Expert can help you sort through the fit details. No gatekeeping, no jargon storm—just solid guidance to help make compatibility questions easier to sort through.
That is the Backcountry approach: sharp gear, real expertise, and fewer workshop plot twists.
Why Buy Your Mavic Freewheel Body from Backcountry?
When you’re dialing in hub and cassette compatibility, Backcountry backs its pricing with a Lowest Price Guarantee — contact the team by chat, phone, or text to request a price match on identical items.
- Price match guarantee — if you find the same item for less elsewhere, Backcountry will match it
- Seasonal clearance — deep discounts on prior-season gear show up throughout the year
- Permanent outlet section — always-on deals for riders shopping with value in mind
- 10% cash back stacks on sale prices — Summit Club+ rewards still apply on clearance items too, unlike most retailers
- No pressure to overbuy — Gearheads help you choose the right setup for your needs, not just the most expensive option