Cassette Wrench X Range

SRAM's X-Range gearing dropped the small cog to 10 teeth across AXS road, AXS XPLR gravel, and Eagle Transmission MTB cassettes. The 10-tooth cog is what lets X-Range run a single-chainring drivetrain with the range of a 2×; but it's also too small for a chain whip or a conventional cassette wrench to engage cleanly. The X Range cassette wrench is the version sized for the 10-tooth small cog, with three steel pins that land in the cog's narrow tooth gaps and a 350 mm handle for the leverage to back the lockring out.

Working on X-Range cassettes without the right holder is the slow way to round teeth. A chain whip wrapped around a 10-tooth cog sits on three or four teeth at most; under the torque the lockring takes to break free, the chain walks, the cog teeth roll, and the chain ends up pulled into the cassette body. The pin-engagement design avoids the walking; the three pins seat in three distinct tooth valleys, the load distributes evenly, and the cog teeth stay flat.

The wrench is specifically for X-Range. The pin spacing on this version is tighter than the standard 11/12t or 13/14t wrench; trying to use the X Range wrench on a conventional 11- or 12-tooth small cog won't seat the pins right, and trying to use the 11/12t version on a 10-tooth cog won't seat at all. The three Unior cassette wrenches don't overlap; they tile the small-cog range from 10 teeth to 14 teeth.

What counts as X-Range

SRAM's X-Range cassettes include:

• Red AXS, Force AXS, Rival AXS, Apex AXS road; 10-26, 10-28, 10-30, 10-33, 10-36 cassettes (the leading "10" is the small cog)
• AXS XPLR gravel; 10-44, 10-46, 10-52 cassettes
• Eagle Transmission MTB; XX SL, XX, X0, GX, S1000 12-speed T-Type cassettes (10-52 standard)
• Eagle AXS; 10-50, 10-52 cassettes (pre-Transmission)

For SRAM 11- and 12-speed cassettes with an 11-tooth small cog (older Eagle, GX 11-speed, road 1× pre-AXS), the 11/12t version is the right pick.

SRAM X-Range gearing reference covers the rationale for the 10-tooth design; narrower side-to-side chain geometry, larger jumps between cogs, wider total range from one chainring.

Compatibility

• SRAM AXS road cassettes (10-tooth small cog): Red, Force, Rival, Apex
• SRAM AXS XPLR gravel cassettes
• SRAM Eagle Transmission (T-Type) MTB cassettes
• SRAM Eagle AXS 12-speed MTB cassettes
• Not for SRAM HG or XD/XDR cassettes with 11- or 12-tooth small cogs (use 11/12t)

Specs

• Three pin engagement on the 10-tooth small cog
• Notched pins for slip resistance under load
• 350 mm handle for full lockring break-free leverage
• X-Range-specific pin spacing
• Article number: 1670/2BI-US (X-Range variant)

Built in Zreče, Slovenia

Unior has been forging hand tools in Zreče since 1919, and sponsors professional road and mountain-bike race teams. SRAM's X-Range gearing was a real drivetrain change; the 10-tooth small cog needs a cassette wrench sized to it, not a workaround on an 11/12t tool. The X Range cassette wrench is the third member of the Unior cassette-wrench family, sized to match the cog size SRAM moved the field to.

Pro tip from our mechanics

Most workshops doing AXS service ended up buying an X-Range wrench within a season of the cassette pattern shipping in volume; the cog-rounding risk on a chain-whip workflow with 10-tooth small cogs convinced people fast. If your shop only sees AXS occasionally, the wrench is a one-purchase fix for every X-Range cassette swap from now on. For workshops handling Eagle Transmission specifically, this wrench is the cassette-side tool that pairs with the Multispeed Chainwhip 1660/2DP-US (which also covers Flattop) when the chain whip is preferred on the larger cogs. The cassette-replacement workflow covers the X-Range workflow end-to-end: When and how to replace your cassette →

FAQ

Which drivetrains need the X Range cassette wrench? SRAM X-Range gearing, which drops the smallest cog to 10 teeth: AXS road, AXS XPLR gravel, and Eagle Transmission MTB cassettes. If your cassette's smallest cog has 11 or 12 teeth you want the 11/12t version instead, and 13 or 14 teeth the 13/14t version.

Why won't a normal cassette wrench or chain whip work on a 10-tooth cog? A 10-tooth cog is too small for a chain whip or a conventional cassette wrench to engage cleanly - there simply is not enough tooth surface to grip safely under lockring torque. The X Range version's three steel pins are sized to land in the 10-tooth cog's narrow tooth gaps, so the hold is positive before you lean on the 350 mm handle.

Why does the tool in the technique photo show a 12 marking? The in-use photo shows the 11/12t body of the same wrench family demonstrating the technique. The X Range version you are buying here is the same forged wrench with its pins sized for the 10-tooth cog - the head is etched 10 AXS X-RANGE.

Can I still use a chain whip on X-Range cassettes? On the larger cogs, yes - for Eagle Transmission work some mechanics prefer a chain whip there, and the Multispeed Chainwhip 1660/2DP-US (which also covers Flattop chain) is the one to pair with this wrench. On the 10-tooth small cog itself, the pin wrench is the tool that engages cleanly.