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This Comp model has also been enhanced with Ritchey’s VFA (Vector Force Analysis) technology to ensure grip is provided in the correct areas of this mountain bike tire. This means you can thrash up and down the trails with more confidence.
VFA Design: When creating tread profiles for the first Ritchey tires, Tom Ritchey looked at the way tires wore down to identify where they need tread the most. The result of this observation is Vector Force Analysis, an approach that had been used in car tire design but never before with bicycles. From VFA, Tom designed some of the more iconic Ritchey tires, including the Olympic- and world championship-proven SpeedMax and Z-Max treads.
We will happily refund any item purchased on Wiggle if returned to us within 365 days; excluding Wiggle gift vouchers, nutrition and customised products, except when faulty.
Please note: Bikes and other bulky items cannot be returned using our local returns service (where applicable). Please contact us and we can arrange to collect these from you using our discounted courier rates. There is a fee for all collections, except for faulty products.Returned goods must be unused and supplied with their original packaging, unless the goods are faulty. Wiggle will pay the return postage costs for any faulty items.