Precise, smooth, silent shifting
Alternating narrow and wide teeth (narrow-wide profile). Better chain retention, less chain slap and less noise, even on technical terrain.
Set of Ceramic Bearing Jockey Wheel 12T & 14T Narrow-Wide AL7075
The IMPALAPRO 12T & 14T are a pair of ceramic derailleur pulley wheels with narrow-wide teeth: more precise, smoother and quieter shifting. A sealed silicon nitride bearing, CNC 7075 aluminum at 10 g and 11.5 g, and 12 anodized colors.
Specifications
- MATERIAL
- Anodized CNC 7075 aluminum
- BEARING
- Sealed silicon nitride ceramic (Si3N4)
- RACES
- Stainless steel
- TEETH
- Narrow-wide (12T + 14T)
- DIAMETER
- 52 mm (12T) · 60 mm (14T)
- WEIGHT
- 10 g (12T) · 11.5 g (14T)
- SPEEDS
- 9 to 12
- COMPATIBILITY
- Compatible with Shimano and SRAM
- DERAILLEUR BOLT
- 4, 5 and 6 mm (adaptors included)
- UNITS
- Set of 2 (12T upper + 14T lower)
- COLORS
- 12 on amazon.com
Frequently asked questions
The 12-tooth wheel is the upper (guide) wheel and the 14-tooth one is the lower (tension) wheel. When fitting them, check they line up properly with the chain.
Compatible with Shimano and SRAM: most 9, 10, 11 and 12-speed drivetrains, on road, gravel and MTB. Not compatible with every Campagnolo derailleur because of their specific design. Check your derailleur model first.
The thick adapter for a 4 mm bolt, the thin one for 5 mm and none for 6 mm. They come included.
Alternating narrow and wide teeth hold the chain better. Shifting is faster and more precise, with less chain drop, vibration and noise.
Clean them every 250 km or after riding in rain or mud. Lubricate only the bearings (they come pre-lubricated), sparingly and never the surface of the wheel. Inspect them after around 750 km of hard use.
The 12T weighs 10 g and measures 52 mm in diameter; the 14T weighs 11.5 g and measures 60 mm.
Yes, it's the same part: the two small toothed wheels in the rear derailleur cage. The upper one guides the chain onto the cassette and the lower one keeps it under tension.
Complete your machine.
Engineering designed to work together.
