“Normally I would rate this at five stars however the two chains I purchased were to replace two identical chains that had developed several cracks. Both chains were well within wear limit tolerance. One CN-M7100 had cracks only on the inboard plates and the other only on the outboard plates. One chain suffered a complete failure. I visited 99 Bikes Fyshwick ACT for advice and on seeing the chains they felt it may possibly be a batch issue and requester I email them the details and photos. I promptly did as requested. This was a while ago and to this point I haven’t received an acknowledgement of the information or any reply at all. I was surprised at both the Shimano failures and 99 Bikes not following up as intended.”
