Renthal 420-55P Rear Grooved Sprocket, Model 96-02 Honda CR80RB, Part 189U-420-55GRSI

Renthal UltraLight Rear Chainwheels are CNC machined from 7075 T6 aluminum to extremely tight tolerances, 66% lighter than steel. Computer engineered and tested to ensure a precise fitment, concentricity and load dispersion with tooth profiling to provide maximum power transfer. A combination of high strength base material, cutting edge manufacturing methods and exceptional hardwearing surface treatments its clear to see why Renthal's light weight all aluminum rear sprockets can be found on the rear wheels of many factory race team machines.

The Renthal 420-55P UltraLight Rear Chainwheel is a CNC-machined aluminum rear sprocket designed for powersports applications. It is manufactured from 7075 T6 aluminum and engineered for precise fitment, concentricity, and load dispersion. The lightweight all-aluminum construction is stated to be 66% lighter than steel, while the tooth profiling is designed to support efficient power transfer.

This silver rear grooved sprocket is identified by manufacturer part number 189U-420-55GRSI and vendor part number 189U-420-55GRSI. The product name identifies it as a 420-55P, 55-tooth sprocket for the 1996–2002 Honda CR80RB model range. Listed fitment also includes the 2007, 2008, 2009, and 2012–2015 Honda CRF150R, as well as the 1986–1990 Honda CR80R. Verify the motorcycle year and model before ordering to confirm fitment.

Renthal combines high-strength base material, precision CNC machining, and hardwearing surface treatments in this rear chainwheel. Its computer-engineered design is intended to provide consistent performance and reliable load distribution for applications requiring a lightweight aluminum sprocket.

Features:

• Construction: CNC machined from 7075 T6 aluminum
• Weight: Stated to be 66% lighter than steel
• Tooth count: 55 teeth
• Sprocket type: 420-55P rear grooved sprocket
• Finish: Silver
• Design: Computer engineered and tested for precise fitment, concentricity, and load dispersion
• Tooth profile: Designed to provide power transfer
• Manufacturer part number: 189U-420-55GRSI
• Vendor part number: 189U-420-55GRSI
• Fitment: 1996–2002 Honda CR80RB, 2007–2009 and 2012–2015 Honda CRF150R, and 1986–1990 Honda CR80R

Air Freight Prohibited: false
Not Carb Approved: false
Ltl Freight Required: false
Prop 65: Unknown
Part Type: powersports
Epa: N/A
Carb Acknowledgement Required: false
Regular Stock: t
Units Per Sku: 1
Fitment:
1986 Honda CR80R Base
1987 Honda CR80R Base
1988 Honda CR80R Base
1989 Honda CR80R Base
1990 Honda CR80R Base
1991 Honda CR80R Base
1992 Honda CR80R Base
1993 Honda CR80R Base
1994 Honda CR80R Base
1995 Honda CR80R Base
1996 Honda CR80R Base
1996 Honda CR80RB Expert Base
1997 Honda CR80R Base
1997 Honda CR80RB Expert Base
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1998 Honda CR80RB Expert Base
1999 Honda CR80R Base
1999 Honda CR80RB Expert Base
2000 Honda CR80R Base
2000 Honda CR80RB Expert Base
2001 Honda CR80R Base
2001 Honda CR80RB Expert Base
2002 Honda CR80R Base
2002 Honda CR80RB Expert Base
2003 Honda CR85R Base
2003 Honda CR85RB Expert Base
2004 Honda CR85R Base
2004 Honda CR85RB Expert Base
2005 Honda CR85R Base
2005 Honda CR85RB Expert Base
2006 Honda CR85R Base
2006 Honda CR85RB Expert Base
2007 Honda CR85R Base
2007 Honda CR85RB Expert Base
2007 Honda CRF150R Base
2008 Honda CRF150R Base
2009 Honda CRF150R Base
2012 Honda CRF150R Base
2013 Honda CRF150R Base
2014 Honda CRF150R Base
2015 Honda CRF150R Base
2016 Honda CRF150R Base
2017 Honda CRF150R Base
2018 Honda CRF150R Base
2019 Honda CRF150R Base
2020 Honda CRF150R Base
2021 Honda CRF150R Base