Quick answer
Buy expansion plugs only if your Peak Design Motorcycle Stem Mount is missing its plugs or they no longer grip the stem. Buy long clamping bolts only if your Capture clip cannot close around a thick strap or belt. These are replacement and fit-extension parts, not upgrades, so match the part to the exact problem before ordering.
Motorcycle Stem Mount
What each part actually changes
Expansion plugs sit inside the motorcycle steering stem and give the mount something to grip. The replacement set includes small and large plugs plus a hex wrench, so you can match the plug to the stem opening rather than forcing one size. Long clamping bolts replace the standard bolts on Capture v2, CapturePRO, CaptureBINO and CaptureP.O.V. clips, letting the clip open wider around thicker straps. Neither part changes how the mount attaches to the bike or how the clip locks; they only solve a specific fit limit.
Check compatibility before you buy
For the stem mount, confirm you own the Peak Design Motorcycle Stem Mount and that the issue is the plug, not the stem itself. If the mount wobbles because the stem opening is an unusual size, measure the opening first; the kit gives you two plug sizes, but it cannot cover every stem. For the bolts, check that your clip is a Capture v2 model, CapturePRO, CaptureBINO or CaptureP.O.V. Older Capture versions are not listed as compatible with these long bolts, so do not assume they will thread correctly.
When the problem is not the hardware
A loose stem mount is often caused by a plug that has compressed or was never tightened, not by a missing part. Re-seat the plug and tighten it with the supplied hex wrench before ordering a replacement. A clip that will not close around a strap may simply be on the wrong part of the strap; move it to a thinner section before buying longer bolts. If the strap is genuinely too thick at every usable point, the long bolts are the correct fix.
Decision rules for choosing hardware
- The stem mount is loose or missing its plug: Replace the expansion plugs if the mount is the Peak Design Motorcycle Stem Mount and the stem opening matches one of the two supplied sizes. Order the plug kit; do not add long bolts, which do not affect stem fit.
- The Capture clip will not close around a thick strap: Use long clamping bolts only if your clip is Capture v2, CapturePRO, CaptureBINO or CaptureP.O.V. and the strap is too thick at the point where you want to mount. Confirm the clip model before ordering; older Capture clips are not listed as compatible.
- The mount moves but the plug looks fine: Re-tighten the existing plug with a hex wrench and test again before buying replacement plugs. If it still moves, measure the stem opening and compare it to the small and large plug sizes.
Parts that solve specific fit problems
- Motorcycle Stem Mount Expansion Plugs: Replacement expansion plugs for the Peak Design Motorcycle Stem Mount, including small and large plugs plus a hex wrench. Two plug sizes let you match the stem opening, and the included wrench means you can install them without hunting for a tool.
- Long Clamping Bolts (v2): A set of 2 long clamping bolts for Capture (v2 models only), CapturePRO, CaptureBINO and CaptureP.O.V., allowing the clip to fit around thicker straps. These extend the clip's opening for thick straps, but only on the listed clip models, so check your clip version first.
Who each part is for
Best for
- Riders whose Peak Design Motorcycle Stem Mount is missing a plug or has a worn plug that no longer grips
- Capture v2, CapturePRO, CaptureBINO or CaptureP.O.V. owners who need to mount on a thick strap or belt
Not for
- Riders with a stem opening that does not match either supplied plug size; measure first and consider a different mounting approach
- Owners of older Capture clips not listed as compatible with the long bolts
