absoluteBLACK Premium Shimano 110/4 bcd compatible oval chainrings are designed for new type of Shimano cranks Dura-Ace 9100 & Ultegra 8000 only. These are finest oval chainrings on the market in terms of shifting, smoothness of pedaling and manufacturing quality. (They can be also retrofitted to 9000 and 6800 cranks). 10/11/12spd compatible.
34T (31g) 36T (37g) 38T (41g) 39T (42g) 50T (120g) 52T (137g) 53T (139g) Compatibility: Shimano Dura-Ace 9100, R9150 Di2 and Ultegra 8000, R8050 Di2. They can also retrofit 9000 and 6800 cranks but use bolt covers for best appearance. 10 / 11 / 12spd compatible.
Materials: CNC machined 7075 Txxx Aluminum. Long-lasting construction. Type II anodizing
Mounting: 110 BCD x 4
Ovality: Optimized to each size separately. 34T- 6.5% ; 36T, 38T, 39T- 11.4%, 50/52/53T - 10-11.2% ; Timing of 108 -110.5° after TDC (top dead center) - Ideal for road climbing. Patent Pending.
Exchange, Returns, and Refunds Policy
As the purchaser you are entitled to a cooling-off period of 14 days, which begins on the day that you receive the goods. You must contact us before the 14 days expire. You will be responsible for the cost of returning the goods. An indication of this cost can be gleaned from the shipping fees originally charged to you.
If the purchase you wish to cancel is a service (e.g. a bike maintenance service, a bike holiday) you have 14 days from the date of the purchase to contact OnIt Sports direct, unless the service was scheduled within 14 days of you making the purchase. If this is the case at least one hour’s notice must be given (via email or telephone) to, and acknowledged by, OnIt Sports.