EX­PERT’S GUIDE TO... TREAD PAT­TERNS

Un­der­stand­ing the rub­ber un­der your bike is cru­cial to mak­ing the most of it. Get into the groove

Motorcycle News (UK) - - Garage - Jim Wor­land is Met­zeler UK Di­rec­tor and has worked in mo­tor­cy­cling for 23 years on road and race tyres.

The tread pat­tern of a tyre per­forms two main func­tions; clear­ing wa­ter ef­fi­ciently and main­tain­ing the me­chan­i­cal grip of the tyre on the road. As tyres have be­come more spe­cialised over the years, the tread pat­terns have also be­come more fo­cused for ex­treme grip, wet weather efi­iciency, mileage, and brak­ing per­for­mance.

The min­i­mum al­lowance for grooves in a road tyre is 4%, as seen on the Met­zeler Racetec RR, while the Road­tec 01 has 20% of its sur­face given over to the tread pat­tern. A typ­i­cal ra­tio is about 15%, while tread depths on a road tyre can vary be­tween 5mm and 10mm, with a deeper tread for more mileage or adventure bike use.

One of the tyre in­dus­try’s great­est fo­cuses is solid wet weather per­for­mance Tread pat­tern is more im­por­tant that you might first think in your tyre choice

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