Collection: Mountain Bike Crank Spares

Our mountain bike crank spares are primarily designed for Middleburn cranksets, but many components (such as crank bolts, extractor caps, and spacers) are compatible with a range of other crank brands. Compatibility depends on the crank interface and thread type, so it’s always best to check specifications before ordering. If you’re unsure, our team can confirm which parts will work with your current setup.

A self-extracting crank bolt simplifies crank removal by eliminating the need for a separate puller tool. It uses an integrated cap system that releases the crank arm when the bolt is unscrewed. Many riders prefer this option for convenience and ease of maintenance. BETD stocks self-extracting crank bolts as part of our high-quality mountain bike crank spares collection, suitable for a variety of Middleburn and compatible cranksets.

Identifying the right crank bolt or cap depends on the crank model, thread size, and extraction system used. Most Middleburn crank arms will specify the required bolt type, and replacements are listed clearly within our mountain bike crank spares range. If your setup isn’t standard or you’re restoring an older model, you can send us details or photos and we’ll help you match the correct component.

Yes, BETD produces a wide selection of mountain bike crank spares compatible with both current and legacy Middleburn models. Many riders choose to refurbish older cranks rather than replace them entirely, and we continue to supply extractor caps, bolts, and spacers to make that possible. If your crank model has been discontinued, our team can advise on the best modern equivalent.

Crank spacers are used to fine-tune the chainline and eliminate side-to-side play in your crankset. Proper spacing ensures smoother pedalling, better shifting, and longer bearing life. When fitting new mountain bike crank spares, always recheck the alignment and crank preload after installing spacers to achieve optimal performance.

Yes, we supply precision-made extractor caps as part of our mountain bike crank spares range. These are machined from durable materials to match original specifications and ensure long-term reliability. They’re available for most Middleburn crank models and can be ordered individually or as part of a full replacement kit.

Absolutely. Our team has in-depth technical knowledge of Middleburn and other MTB crank systems. Whether you’re replacing worn components or rebuilding a full crank assembly, we can guide you through the selection process to ensure you get the exact mountain bike crank spares you need for your build; contact us today.