This trainer is not designed for 20" tires. However, you can purchase a wheel adapter on CycleOps' site. Depending on your bike, you may need to remove your rear fender each time you use the trainer. Trainers won't necessarily wear your tire out faster, but the wear on the tire is all concentrated in the middle of the tire while riding on the road will wear out your tire evenly. If you do plan on using the trainer a lot, you may want to get a trainer tire specifically so you can then switch back to your regular tires for road riding.
Date published: 2017-01-10