This is the hope bash ring 3638 tooth hopes new aluminium bash ring takes the place of the large chain ring on single or double ring set ups ideal for the new breed of 1 x 10 or 2 x 10 drivetrains cnc machined from aerospace grade heat treated aluminium this blends amazingly strong protection with super low weight the anodised finish available in all our 6 colours guarantees it looks as awesome as it performs available in 104mm pcd 4 bolt pattern and for 3638t chain rings