The Torno chainring is produced specifically for the Torno by both Wolftooth and Campagnolo. The Wolftooth version is optimized for 11-speed and 12-speed drivetrains while the Campagnolo version is made specifically for 13-speed Ekar drivetrains. Some use the “wrong” chainring with their drivetrain without a problem, but we cannot guarantee that it always works (in fact we know that in some cases it does not) so in general we cannot recommend this.
All Torno-specific chainrings use a narrow-wide tooth pattern for the best performance. The countersunk bolt pattern is dedicated to the Torno spider, transferring your power not just via its bolts but also its shape for optimal power transfer.
• Wolftooth Torno chainring comes in size 36T, 40T, 42T, 44T and 46T for 11-sp and 12-sp chains. Please note that the 36T size comes in 2 slightly different versions, one specifically for any 11-speed and 12-speed Eagle and one that is compatible with any 11-speed and any 12-speed chain,
• Campagnolo Torno chainring comes in 38T and 40T sizes for the 13-speed Ekar chain (perfect for road and gravel as it can be matched with respectively the Ekar 9-36T, 9-42T or 10-44T cassettes)