Surly Monkey Nuts

These spacers fit into your frame's horizontal slotted dropouts to push the rear wheel back by 12.5mm. This adjustment creates extra tire clearance and helps align your drivetrain for better shifting performance.

Yes, they are compatible with quick-release and 10mm bolt-on axles, but you will need to use the appropriate adapter washers to ensure a secure fit.

While Monkey Nuts were originally designed to help clear modern front derailleurs, they are still very useful for 1x setups if you need extra tire clearance or want to adjust your wheelbase for better handling.

Each package contains one spacer. If you are setting up a standard rear wheel, you will need to purchase two packs to outfit both sides of your frame.

No, they are specifically engineered for frames featuring horizontal slotted dropouts. They will not work with standard vertical dropouts.