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. SPROCKET FRONT - 11T MONTESA 4RT 05-19 4-RIDE 16-19 APICO FRONT SPROCKET - (11T) OEM - 23801-NN4-000 MONTESA 4RT 250/260 05-24 RESPOL EDITION 250/260 05-24 300RR 16-18 301RR 20-24 4-RIDE 15-24