Parts › GREEVES CHALLENGER MX 2,3 KIDNEY SHAPE GEARBOX SPROCKET (428) 15 TEETH GREEVES PART NUMBER G1134/29 Image 1 of 3 Image 2 of 3 Image 3 of 3 GREEVES CHALLENGER MX 2,3 KIDNEY SHAPE GEARBOX SPROCKET (428) 15 TEETH GREEVES PART NUMBER G1134/29 £37.50 GEARBOX SPROCKET FOR 1/2” X 5/16” CHAIN Quantity: Add To Cart Added! GEARBOX SPROCKET FOR 1/2” X 5/16” CHAIN