Problem Solvers Steerer Tube Shim
Best adapter for upgrading vintage bikes with modern stem components.
This simple adapter makes it easy to fit a more common 1-1/8-inch stem onto an older 1-inch steerer tube. Its aluminum construction is light and durable, with chamfered edges to prevent damage during installation.
$115.00
at
Tosa Bike Garage
Who it's for
- Cyclists retrofitting older bikes with modern, standard-sized stems
- Budget-conscious riders upgrading cockpits without replacing expensive forks
- Mechanics prioritizing secure, slip-free handlebar and stem interfaces
Who should skip it
- Riders who struggle with precise installation and maintenance
- Cyclists with limited headset stack height clearance
- Users with stems requiring non-standard clamping lengths
Performance breakdown
Installation ease
Chamfered edges make sliding the shim into place remarkably smooth.
Material durability
Anodized aluminum offers excellent resistance against corrosion and daily wear.
Fit precision
Provides a tight, secure interface between stem and fork steerer.
Compatibility range
Perfectly bridges the gap between legacy forks and modern stems.
Weight efficiency
Lightweight aluminum construction adds negligible mass to your front end.
Component alignment
Ensures consistent, stable stem positioning without any unwanted play.
Key Specs
Material
Anodized aluminum
Compatibility
1-1/8-inch stems on 1-inch threadless forks
Inner Diameter
25.4 mm
Outer Diameter
28.6 mm
Length
38 mm
Finish
Anodized
Chamfered Edge
Yes
Corrosion Resistant
Yes
Model Number
SM5320
UPC
708752017610
Know before you buy
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