Shim Converter?
Moderator: robbosmans
Visit starbike.com Online Retailer for HighEnd cycling components
Great Prices ✓ Broad Selection ✓ Worldwide Delivery ✓
www.starbike.com
I did that for a while. I used a thomson aluminum shim.
It is perfectly safe.
There were only a few mnor downsides:
1. It adds weight, so you don't really save any weight over going to a larger seatpost.
2. It creates an additional gap where the shim doesn't quite close, that could be a path for water intrusion. Fill it with grease.
3. I could never decide of the top rim of the seatpost clamp should go over the top rim of the shim, or under it. I think I ended up keeping the shim up just the thickness of the seatpost clamp so that the clamp sat just underneath the shim's lip. If the clamp is over the shim's lip, it might create a stress concentration on the seatpost.
4. When you adjust the saddle, everything slides around, so it is a little more inconveniently fiddly.
It is perfectly safe.
There were only a few mnor downsides:
1. It adds weight, so you don't really save any weight over going to a larger seatpost.
2. It creates an additional gap where the shim doesn't quite close, that could be a path for water intrusion. Fill it with grease.
3. I could never decide of the top rim of the seatpost clamp should go over the top rim of the shim, or under it. I think I ended up keeping the shim up just the thickness of the seatpost clamp so that the clamp sat just underneath the shim's lip. If the clamp is over the shim's lip, it might create a stress concentration on the seatpost.
4. When you adjust the saddle, everything slides around, so it is a little more inconveniently fiddly.