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CeramicSpeed OSPW X Coated Shimano GRX RX820
Sale price
$734.00
Regular price
$734.00
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SKU: 113781 Option: Black
Pickup available at RA Cycles Brooklyn
Pickup available at RA Cycles Walnut Creek
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Stock Availability by Location
RA Cycles Brooklyn In stockLow stock (1 left)Low stock (2 left)— Out of stock— Not immediately available
105 5th Ave, Brooklyn, NY 11217718-636-5242
* Available for in-store pickup in 2-4 hours
* Available for in-store pickup in 2-4 hours
* Available for in-store pickup in 2-4 hours
RA Cycles Walnut Creek In stockLow stock (1 left)Low stock (2 left)— Out of stock— Not immediately available
2099 Mt Diablo Blvd, Walnut Creek, CA 94596925-433-7099
* Available for in-store pickup in 2-4 hours
* Available for in-store pickup in 2-4 hours
* Available for in-store pickup in 2-4 hours
Distribution Center - East In stockLow stock (1 left)Low stock (2 left)— Out of stock— Not immediately available
Distribution Center - Central In stockLow stock (1 left)Low stock (2 left)— Out of stock— Not immediately available
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CeramicSpeed OSPW X Coated Shimano GRX RX820
$734.00
CeramicSpeed OSPW X Coated Shimano GRX RX820 Info
The CeramicSpeed OSPW X Coated Shimano GRX RX820 replaces your stock rear derailleur pulley cage with a system built specifically for gravel and cyclocross. CeramicSpeed designed the OSPW X around a 13-tooth upper and 19-tooth lower pulley wheel setup, and the platform has been proven at races like Paris-Roubaix, Strade Bianche, and CX World Cups — events that put a drivetrain through mud, grit, and repeated impact. It's built to bolt directly onto Shimano's 2x-specific GRX RX820 and RX825 derailleurs.
CeramicSpeed rates the OSPW X system at a 35-40% friction reduction over a stock pulley configuration, and this version steps up further with coated bearing races. The coating is a metallic layer roughly 75% harder than the hardened steel races underneath, applied in a 3-micron layer across the entire bearing surface. Combined with CeramicSpeed's ceramic balls, that hardness translates into high resistance to corrosion — even if the bearing gets hit with degreaser, water, or mud — and it's backed by a lifetime warranty rather than the standard bearing's shorter coverage.
The cage itself is handbuilt with a custom molded carbon fiber construction for low weight without sacrificing durability, and four spring tension settings let you dial in cage tension to match the terrain you're riding. Every OSPW X system is handbuilt in Denmark, with the coated bearing sets matched and paired through the coating and quality control process. It's available in Black, Gold, and Red, and it's a direct upgrade for gravel and cyclocross riders running GRX RX820 who want measurably lower drivetrain friction without changing anything else about their setup.
The RA Perspective
We recommend the coated version of the OSPW X to riders who plan to actually put miles on it in bad conditions — the standard bearing is already a step up from stock, but the coating is what holds up when the drivetrain is caked in mud or gets hit with degreaser during a wash, which is a real scenario for anyone racing cyclocross or gravel through fall and winter.
The four spring tension settings are a detail worth using rather than leaving at default — a firmer setting keeps the cage more stable on rough, punchy terrain, while a lighter setting can shave a touch of drag on smoother gravel.
This is a component that rewards riders who are already dialed in everywhere else on the bike. If your drivetrain is worn or poorly maintained, you'll get more benefit from addressing that first before adding an OSPW system on top of it.
We'd point this upgrade toward serious gravel and cyclocross riders running GRX RX820 who want a real, measurable friction reduction and are willing to pay for the coated bearing's added durability and lifetime warranty.
PRICE MATCH GUARANTEE
We will price match against advertised or quoted prices from other authorized dealers of the product!