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3 years ago

DT May 2018

  • Text
  • Durability
  • Bikes
  • Racing
  • Maico
  • Motocross
  • Riders
  • Rear
  • Rider
  • Yamaha
  • Tyre

The Karoo 3: Dedicated

The Karoo 3: Dedicated to off-road trail riding and adventure journeys, aggressively offroady, works OK on tar albeit a bit on the noisy side. The noise does distract and it does not last too long… The new Karoo Street: Is a unique combination of off-road looks and traction with on-road agility. A true 50/50 tyre. That’s what we were there to sus out… Techy stuff: Tyre Compound: Stiffness is needed to: Support the profile (that characterizes the handling), define the footprint area (which engages the compound and generates grip), wear resistance, thrust and load derived from rolling tyre dynamics. Softness is needed to: Absorb shocks and hits, Copy terrain asperities. The Karoo Street has a high Silica (that’s the sticky stuff) compound with a balanced proportion of carbon-black (that’s the stiff stuff under the sticky stuff) and resins to achieve a high level of grip on road, in both dry and wet conditions. A relevant percentage of Carbon Black filler still is needed to increase knobs resistance to ‘tearing’ and premature wear when used on-road. Tread pattern design: Much of Karoo Street’s performance is delivered by a tread pattern evolved from the layout of Karoo 3 and its uniquely shaped knobs. The main focus of its development was to provide great on-road performance with consistent wear, greater mileage, and a high level of stability combined with the ability to hit the dirt tracks. Extra-large central blocks create a wide and solid contact patch to ensure both low and high speed stability on-road. The footprint characteristics are balanced to promote uniform wear, thus providing valuable mileage for this class of tyre. We asked what mileage to expect. The answer was around 10000 kilometres on the rear assuming that the rider does 80 percent tar, twenty on dirt. When riding off-road, the V-shaped knob layout causes multiple operating edges of blocks to ensure acceleration, traction and braking grip. The combination of these characteristics (extra-large blocks and V shaped layout) and their effect (stability, traction, wide contact patch, smooth rolling) helps the tyres to integrate with electronic rider aids such as ABS and Traction Control. (See, we told you.) Longitudinal grooves in the middle of the central blocks provide water evacuation and self cleaning ability for dirt. Wide transversal grooves contribute to make central blocks to dig the soil, providing offroad traction especially on dirt and hardpacked clay soils. The variable block shape (together with the V-shaped knob layout) ensures several contemporarily operating edges with mixed orientation, capable to enhance off-road traction in several conditions. Big lateral blocks with narrow grooves ensure a large contact patch, giving proper cornering grip and stability when leaning on-road. It all sounds like a lot – but there you go. And we bet that you learned a bit. The ride: The boys and girls from Metzeler instructed us all to ride as hard as we liked. No sissy stuff. “Try and slide, brake hard, enjoy yourselves, we want to test the tyres to the maximum.” What a cool ride we had – everyone raves about riding in SA – and we could not agree more, we are truly blessed, but riding in 16 DIRT & TRAIL MAGAZINE MAY 2018

TRUE ADVENTURE. From R155 000 - DCT R168 500 CRF250 Rally READY TO WIN! R84 800 CRF250R R98 000 CRF450R R107 900 Trade-Ins welcome! Finance and insurance arranged in-house. CRF450 RX R110 000 CRF110 R30 000