SKU P210000UB Category

Set 21 Thru Axle for Suntour (Mountain Bike)


Replace your mountain bike’s thru axle with a Pitlock security system. Set21 is fully compatible with Suntour forks that use the QLoc locking system.

This set can be purchased in two lengths: Standard or Boost. Standard installation width is 15mm x 100mm, and Boost installation width is 15mm x 110mm. This set comes with all the necessary components for installation: one black thru axle, one 15mm x 100mm (15mm x 110mm) adapter, and up to two keys.

See below for additional product and sizing specifications.


If you have an existing set you need to match, add your keycode here:


This thru axle set is only suitable for Suntour forks using the QLoc locking system; other forks may not be compatible. The set comes complete with the following: one black thru axle, one 15mm x 100mm (15mm x 110mm for Boost) adapter sleeve, and up to two keys.

The Set21 and Set21B Pitlock thru axles have the following specifications:

  • Installation width: 15mm x 100 mm (Standard), 15mm x 100mm (Boost)
  • Total length: 140mm (Standard), 150mm (Boost)
  • Weight: 2.29oz (65g)
  • Color: black

Installation width is the width between the dropouts, or width of the front hub. Total length is the installation width plus width of the dropouts (the total length of the axle without head and lock.)

If you need additional keys, please order additional keys here: replacement keys. Thru axles use the same size key as the standard Pitlock “quick release” replacement skewers, not the larger Solid Axle keys. Unless you specify otherwise, we will ensure that the additional keys you order will match the coded set you’re given.

Additional details: for installation, this Pitlock thru axle will require a flat surface area of approximately 19mm in diameter. The thru axles is made from high quality stainless steel and aluminum.

Additional information


Standard, Boost

Key Quantity

Without keys, With One (1) Key, With Two (2) Keys


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