The Bike-It Tube Type Motorcycle Tyre is available in a range of options for 17 and 18" Wheel Rims. Each Tyre offers great levels of grip and wear-rates, and are fully E-marked (compliant to ECE No.75).BIKTTT17250K - Size: 250-17. Fitment: Front / Rear. Speed Index Rating: N (87 Mph / 140 Kmh).BIKTTT17250M - Size: 250-17. Fitment: Front Only. Speed Index Rating: N (87 Mph / 140 Kmh).BIKTTT18250L - Size: 250-18. Fitment: Rear Only. Speed Index Rating: N (87 Mph / 140 Kmh).BIKTTT18250N - Size: 250-18. Fitment: Front Only. Speed Index Rating: N (87 Mph / 140 Kmh).BIKTTT18275A - Size: 275-18. Fitment: Rear Only. Speed Index Rating: N (87 Mph / 140 Kmh).BIKTTT18275N - Size: 275-18. Fitment: Front Only. Speed Index Rating: N (87 Mph / 140 Kmh).BIKTTT18300A - Size: 300-18. Fitment: Rear Only. Speed Index Rating: N (87 Mph / 140 Kmh).Please note: Tyres are Cougar brand wherever possible, if Cougar is not available Bike-It will supply an alternative brand of equivalent specification.