Last week we featured the Alienation OS20 rim so we thought it’s only natural to also feature the tire that makes up the combo. Sure there are also OS20 frame and forks (by GT and Chase), and maybe one day we will get on to those.

Things have been slow going for the OS20 system, but with tires and rims now available, it’s gaining momentum. Most of the riders currently jumping on the bandwagon are the over 30’s crowd looking to give their bike a bigger/more stable feel rather than looking for the intended benefits of the bigger outer diameter.

OS20 PowerBlock S-Spec

Race proven by the fastest racers from your local tracks to the top Elites, the PowerBlock is faithfully recreated in OS20 diameter. Every detail, from precise dimension of the center blocks to the optimal proportions of its shoulder tread, is scrutinized to ensure the OS20 PowerBlock fully takes advantage of its larger size.

Application:Race

Material:

• Cyclex 120 TPI Ultralight Casing
• UTC Rubber Compound
• Folding Bead

Weight:

• OS20 x 1.85 (13.05oz; 370g)
• OS20 x 1.60 (10.23oz; 290g)

OS20 PowerBlock

Wire bead with a more robust 60 TPI casing, the practice-grade OS20 PowerBlock has all the same tread and rubber features as the S-Spec version.

Application:Race

Material:

• 60 TPI casing
• UTC Rubber Compound
• Wire Bead

Weight:

• OS20 x 1.85 (15.17oz; 430g)
• OS20 x 1.60 (12.27oz; 348g)

Want to find out more about OS20? Check out www.tiogausa.com/bmx_race/what-is-os20-powerblock