30 Day Unconditional Guarantee
For Trek, Bontrager and Electra products, if for some reason you're not 100% happy with your purchase, you can return it within 30 days for a refund - no questions asked!
| Size | 10mm x 28.5mm | 30mm x 28.5mm |
|---|---|---|
| Thickness | 10 mm | 30 mm |
| Inner diameter | 28.5 mm | 28.5 mm |
| Material | Plastic | Plastic |