Oil Seal 15 21 3
T3600142 · Genuine Triumph
Triumph has stock
Listed for these motorcycles
Speedmaster 1200
2020–2026
Street Triple 675
Choose your year
Daytona 675
2006–2017
Bobber
2017–2026
Listed in Triumph’s parts catalogue for these motorcycles. Fitment is Triumph’s data, not a guarantee from us — add your motorcycle above and we check it against your frame number where Triumph splits the part.
Where it sits on the bike
Rear Suspension Unit
Bonneville Speedmaster · Rear Suspension · callout 3 · qty 2
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Rear Suspension Unit
Bonneville Speedmaster · Rear Suspension · callout 3 · qty 2
View diagram →
Rear Suspension Unit
Bonneville Speedmaster · Rear Suspension · callout 3 · qty 2
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Rear Suspension Unit
Street Triple up to BF1182 · Rear Swinging Arm & Rear Suspension · callout 4 · qty 2
View diagram →
Rear Suspension Unit
Street Triple up to BF1182 · Rear Swinging Arm & Rear Suspension · callout 4 · qty 2
View diagram →
Rear Suspension Unit
Street Triple up to BF1182 · Rear Swinging Arm & Rear Suspension · callout 4 · qty 2
View diagram →
Rear Suspension Unit
Street Triple up to BF1182 · Rear Swinging Arm & Rear Suspension · callout 4 · qty 2
View diagram →
Rear Suspension Unit
Daytona 675 · Rear Swinging Arm & Rear Suspension · callout 4 · qty 2
View diagram →
Rear Suspension Unit - Excluding 675R
Daytona 675 · Rear Swinging Arm & Rear Suspension · callout 4 · qty 2
View diagram →
Rear Suspension Unit
Daytona 675 · Rear Swinging Arm & Rear Suspension · callout 4 · qty 2
View diagram →
Rear Suspension Unit
Bonneville Bobber · Rear Suspension · callout 3 · qty 2
View diagram →
Rear Suspension Unit
Bonneville Bobber · Rear Suspension · callout 3 · qty 2
View diagram →
Rear Suspension Unit
Bonneville Bobber · Rear Suspension · callout 3 · qty 2
View diagram →
Rear Suspension Unit
Bonneville Bobber · Rear Suspension · callout 3 · qty 2
View diagram →
Prices and availability are a dated snapshot, not a reservation — Triumph supply is read from Triumph’s catalogue and our shelf count is read from our own system. Both move. Triumph supply checked Aug 5, 2026 · Brea shelf Aug 18, 2026. Shipping and tax are calculated at checkout.
Genuine Triumph parts from Southern California Motorcycles, 515 W Lambert Rd, Brea, CA 92821 · 714-256-6700