GIZA PRODUCTS SM-21 Handlebar Shim (Ø25.4mm / Ø31.8mm) | Aluminum adapter connecting different handlebar diameters
A small, reliable custom part to avoid giving up on your favorite handlebars.
When customizing a bicycle, a surprisingly tricky issue is the difference in clamp diameter between the handlebar and the stem. The GIZA PRODUCTS "SM-21 Handlebar Shim" is an adjustment shim for installing a 25.4mm diameter handlebar into a 31.8mm clamp stem.
Despite its simple structure, which involves simply attaching it to the stem's clamp section, this convenient item greatly expands your options when replacing handlebars or customizing. It's also useful if you want to use your favorite classic or riser handlebars with a modern standard stem.
Made from high-precision aluminum alloy, it combines lightness and durability, with a sleek finish that blends in naturally. It's a standard item recommended not only as a repair part but also for those who enjoy bicycle customization.
Features
- Adjustment shim for attaching 25.4mm handlebars to 31.8mm stems
- Adapter part to resolve differences in handlebar and stem diameters
- Simple structure: simply attaches to the stem clamp area
- Made of lightweight, high-precision aluminum alloy
- Ensures compatibility when replacing handlebars or customizing
- Convenient for combining classic handlebars with modern stems
- A standard item useful for repairs and reusing parts
SPEC
- Brand: GIZA PRODUCTS
- Model: SM-21 Handlebar Shim
- Material: Aluminum alloy
- Compatible handlebar outer diameter: Ø25.4mm
- Compatible stem clamp inner diameter: Ø31.8mm
- Width: 40mm
- Weight: Approx. 22g
When you're customizing a bicycle, you often encounter situations where you want to use a 25.4mm handlebar, but your stem is 31.8mm. This shim provides a simple solution for such standard differences.
Especially in chromoly bike or old MTB customizations, there are many attractive 25.4mm handlebars, and it's not uncommon to want to combine them with modern 31.8mm stems. In such cases, having one of these is extremely convenient.
It's not a flashy part, but it's a behind-the-scenes hero that greatly expands your customization freedom. If you're considering replacing handlebars or reusing parts, this is an item you'll definitely want to have on hand.
