Allen, Spare Tire Rack - 303ST All Mountain Bikes >>> Mountain Bikes by Allen More details and ordering info. Looking for a rack designed for that rear mount spare tire? The Allen 303ST fits nearly all spare tire sizes and keeps your bikes safely up away from the road and hot exhaust. User input on Spare Tire Rack - 303ST by Allen: Be the first to submit input on this product Submit Input: Your Name: Write or Paste Input here: Upload picture:      Review Guidelines