Apico front sprockets are precision engineered from high grade steel. These are a cost effective option when compared to OEM sprockets and are compatible across a range of motocross, enduro and trials bikes. FRONT SPROCKET - (11T) GAS GAS OEM - MT120236525 TXT/PRO/RACING 02-24 OSSA 11-17 VERTIGO OEM - V-0313 COMBAT/DLR/NITRO 16-24 TRS ONE/RR RR - 250/280/300 16-17 ONE - 250/280/300 16-19