These Wheel Slammers fill the gap between the axle and drop out. They work just like a chain tensioner but with out the bolt, super clean and light. The slammers come in 14 sizes from 0.5mm to 8mm which will work with virtually any frame, sprocket, cog set up. Each slammer has 2 different size on each side so.

The sizes are as follows.
1.5 and 2.0mm
2.5 and 3.0mm
3.5 and 4.0mm
4.5 and 5.0mm
5.5 and 6.0mm
6.5 and 7.0mm
7.5 and 8.0mm

A Peg adapter is also available which provides a larger area for a peg...