Speed’s unique rear dropouts offer versatility no other frame can claim. Every M508, M520, M533, M546, M534, and M536 Speed frame comes with two sets of custom proprietary rear dropout Blocks. The forged and precision CNC-machined Blocks allow you to run either standard 10-millimeter axle wheels or the stiffer and better-handling Sinz Elite 20-millimeter through-axle wheels. Use the 10-millimeter blocks and run any standard wheel set on your new Speed frame. Or, if you prefer better gate snaps, a more powerful and efficient pull down the first straight and better handling, upgrade your wheels to the Sinz Elite 20-millimeter iHub wheels and use the 20-millimter Blocks. Both 10- and 20-millimeter Blocks are also available separately. They come in black anodized only.

Part#: SRC20-BK