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This is the Comp version of the Shield tyre and to ensure you have reliable grip as you thrash down the trails, it adopts Ritchey’s VFA (Vector Force Analysis) design on its shoulder knobs for consistent traction at various angles.
VFA Design: When creating tread profiles for the first Ritchey tyres, Tom Ritchey looked at the way tyres wore down to identify where they needed tread the most. The result of this observation is Vector Force Analysis, an approach that had been used in car tyre design but never before with bicycles. From VFA, Tom designed some of the more iconic Ritchey tyres, 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.