Renthal's chainwheels are precision CNC machined to extremely tight tolerances to give the ultimate combination of strength and light weight.
The 7075 T6 aluminium alloy chainwheels are 66% lighter than steel, yet incredibly durable.
Their advanced tooth profile, concentricity and accuracy of fit provide maximum power transfer and long-life.
Renthal's combination of a very high strength base material and an exceptionally hardwearing surface result in significantly increased chainwheel life.
The Renthal SR4 chainrings are legendary in their stiffness and longevity. The 5mm thick Ultralite™ chainring uses an I-Beam section tooth support bed, for the highest possible stiffness at the lowest possible weight. CNC machined from 7075 T6 aluminium , the hard anodised surface treatment massively increases the lifespan of the chainring.
Continuing the Renthal theme of offering the rider as much choice as possible, every tooth size from 32t right up to 44t are available.
Sizes 32t through 40t have a slightly offset tooth bed, for compatibility with chain devices which use a bash ring as the outer guide. Sizes 41t through 44t have a centralised tooth bed, for better chainline when used on a race BMX.
Renthal® SR4 chainrings are designed to ride faster, jump further and last longer.
* Computer aided Ultralite™ design enables the ultimate combination of strength and lightness
* High strength 7075-T6 aluminum alloy provides excellent durability
* Slightly offset toothbed on size 32-40t, for chain device compatibility
* Hard anodised surface coating for increased longevity
* Precision CNC machined to extremely tight tolerances
* Single speed, 8, 9 and 10 speed compatible
* Sizes: 32t - 44t.
* 104mm BCD (bolt circle diameter)5/64" 8/9/10sp
* 7075 T6 aluminium
* 32t = 38g weight
WESTBROOK CYCLES DELIVERY NOTICE
FREE when you spend over £50.00 in a single order
Otherwise it's typically £3.99 per order
Delivery should be expected between 2-3 working days unless stated on product page.
Approximately 4-10 working days depending on country
via Parcelforce Signed Delivery (fully traceable service). Please add items to the basket to calculate delivery for desired country.
If your country isn't listed for delivery at checkout please contact us.
Delivery of Bikes
We ship all our bikes free of charge within the United Kingdom (excl. Jersey and the Channel Islands at this time) and all our bikes come pre-assembled with just a few tweaks required (Please see our Bike Build Instruction page for details of assembly required).
All our bikes undergo a safety check before being re-boxed for shipping which can during busy periods take a little longer to complete so whilst we aim to ship all our bikes within two working days of the order please allow for additional time for this process.
All our consignments irrespective of the carrier require a signature upon delivery, deliveries are typically made between 08:00 and 18:00 so please bare this in mind when choosing a delivery address.
We do try when possible to reuse packaging from our own suppliers in order to send purchased items to our customers, we ask if the packaging is still in good condition after you've received your goods then please try to use it again or recycle if not possible.