Chain & Sprockets
- BMW S1000RR (2009–2026) — stock front sprocket size = 17T
- BMW S1000R (2014–2022) — stock front sprocket size = 17T
- BMW M1000RR (2021–2026) — stock front sprocket size = 17T
Product Overview
This is a 17-tooth front (countershaft) sprocket from JT Sprockets, designed for BMW S1000 platform bikes running a 525 chain. All main fitment bikes run 525 stock from the factory and carry a 17-tooth front sprocket, making this a direct OEM replacement.
Key Technology & Design
- Made from heat-treated steel for durability
- Lightened with radial holes to reduce rotating mass
- Computer-designed tooth profile for strength at minimum weight
Specs
- Manufacturer: JT Sprockets
- Part Number: JTF404.17
- Distributor SKU: 1212-0766
- Type: Countershaft
- Material: Steel
- Finish: Natural
- Tooth Count: 17
- Chain Size: 525
- Mounting Position: Front
- Units: Each
Replaces OEM Part Numbers
No OEM replacement data provided.
Fitment
Main Fitment
Year(s) — Make / Model — OEM Gearing — OEM Chain
| 2009–2014 | BMW S1000RR | 17T / 45T | 525 — 118 links |
| 2015–2026 | BMW S1000RR | 17T / 45T | 525 — 120 links |
| 2021–2026 | BMW M1000RR | 17T / 45T | 525 — 120 links |
| 2014–2020 | BMW S1000R | 17T / 45T | 525 — 118 links |
Additional Fitment
Year(s) — Make / Model — OEM Gearing — OEM Chain
| 2015–2022 | BMW S1000XR | 17T / 45T | 525 — 128 links |
| 2013–2015 | BMW HP4 | 17T / 45T | 525 — 118 links |
Gearing — Staying Stock or Making a Change
This sprocket is 17 teeth, which matches the stock front sprocket size on all main fitment bikes. Running this sprocket with a stock size rear sprocket keeps your gearing identical to OEM.
If you want to adjust your gearing, here is what tooth count changes actually do in practical terms:
Going one tooth smaller on the front (16T) shortens your gearing — the bike accelerates harder through each gear, the engine revs higher at any given speed, and top speed is reduced. The effect is roughly equivalent to adding approximately two to three teeth to the rear sprocket. This is one of the most popular gearing changes on both the S1000RR and S1000R — many riders prefer the more aggressive feel it provides on the street and especially on track.
Going one tooth larger on the front (18T) lengthens your gearing — the bike revs lower at cruising speeds and acceleration from a stop is slightly softer. Riders focused on top speed or extended highway miles occasionally run this setup.
Neither change is right or wrong — it depends entirely on how and where you ride. Stock gearing is well matched for most street use on these bikes.
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IMPORTANT: Please Review Your Owner’s Manual for Exact Amounts or Sizing of This Product!
Speak to one of our experts today:
469-490-3577
JT Sprockets
SKU:1212-0766
Description:JT Sprockets Front Sprocket — 17 Tooth, 525, BMW
Main Fitment:
- BMW S1000RR (2009–2026) — stock front sprocket size = 17T
- BMW S1000R (2014–2022) — stock front sprocket size = 17T
- BMW M1000RR (2021–2026) — stock front sprocket size = 17T
Product Overview
This is a 17-tooth front (countershaft) sprocket from JT Sprockets, designed for BMW S1000 platform bikes running a 525 chain. All main fitment bikes run 525 stock from the factory and carry a 17-tooth front sprocket, making this a direct OEM replacement.
Key Technology & Design
- Made from heat-treated steel for durability
- Lightened with radial holes to reduce rotating mass
- Computer-designed tooth profile for strength at minimum weight
Specs
- Manufacturer: JT Sprockets
- Part Number: JTF404.17
- Distributor SKU: 1212-0766
- Type: Countershaft
- Material: Steel
- Finish: Natural
- Tooth Count: 17
- Chain Size: 525
- Mounting Position: Front
- Units: Each
Replaces OEM Part Numbers
No OEM replacement data provided.
Fitment
Main Fitment
Year(s) — Make / Model — OEM Gearing — OEM Chain
| 2009–2014 | BMW S1000RR | 17T / 45T | 525 — 118 links |
| 2015–2026 | BMW S1000RR | 17T / 45T | 525 — 120 links |
| 2021–2026 | BMW M1000RR | 17T / 45T | 525 — 120 links |
| 2014–2020 | BMW S1000R | 17T / 45T | 525 — 118 links |
Additional Fitment
Year(s) — Make / Model — OEM Gearing — OEM Chain
| 2015–2022 | BMW S1000XR | 17T / 45T | 525 — 128 links |
| 2013–2015 | BMW HP4 | 17T / 45T | 525 — 118 links |
Gearing — Staying Stock or Making a Change
This sprocket is 17 teeth, which matches the stock front sprocket size on all main fitment bikes. Running this sprocket with a stock size rear sprocket keeps your gearing identical to OEM.
If you want to adjust your gearing, here is what tooth count changes actually do in practical terms:
Going one tooth smaller on the front (16T) shortens your gearing — the bike accelerates harder through each gear, the engine revs higher at any given speed, and top speed is reduced. The effect is roughly equivalent to adding approximately two to three teeth to the rear sprocket. This is one of the most popular gearing changes on both the S1000RR and S1000R — many riders prefer the more aggressive feel it provides on the street and especially on track.
Going one tooth larger on the front (18T) lengthens your gearing — the bike revs lower at cruising speeds and acceleration from a stop is slightly softer. Riders focused on top speed or extended highway miles occasionally run this setup.
Neither change is right or wrong — it depends entirely on how and where you ride. Stock gearing is well matched for most street use on these bikes.
