This is the hope integrated bash ring chain ring 104mm bcd new for 2013 this is a chainring with an integrated bash ring ibr cnc machined 7075 t6 aluminium provides the perfect blend of light weight and strength a hard anodised finish makes these ultra durable and increases longevity to be used with 1x setups for xc trail am and enduro and are designed to be used alongside hopes new range of chain guides available in 104mm pcd 4 bolt pattern and in 32t 33t 34t 35t and 36t sizes