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 | 5mm x Aero | 15mm x Aero |
|---|---|---|
| Thickness | 5mm | 15 mm |
| Inner diameter | Aero | Aero |