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Kogel Kolossos Shimano GRX and RX800 Oversized Pulley Cage

★★★★★ ★★★★★
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£399.00
Kogel
Kolossos Shimano GRX and RX800 Oversized Pulley Cage

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Product ID: 1403706

Kogel Kolossos Shimano GRX and RX800 Oversized Pulley Cage

Designed for the gravel inspired Shimano GRX and Ultegra RX800 groupsets, this Kogel Kolossos oversized pulley and cage combination is a watt saving upgrade for the most dedicated riders. The larger sized pulley wheels reduce chain articulation and feature durable, friction reducing ceramic bearings to maximise drivetrain efficiency, helping the rider realise more speed and lessening their fatigue during intense or long days in the saddle.

The pulley wheels are housed in a tremendously stiff cage conceived to improve the precision and smoothness of rear derailleur changes, something that is often lacking from other oversized pulley systems. The cage integrates a chain retainer, and this teams with elongated teeth on the lower pulley to cancel chain slips across the roughest tracks, trails and paths.

Includes

  • Rear derailleur cage
  • 12-tooth upper pulley with ceramic bearings
  • 19-tooth lower pulley with ceramic bearings

Features

  • An oversized derailleur cage and pulleys wheels for Shimano GRX 2x and Ultegra RX800 Di2 and mechanical 11-speed rear derailleurs
  • This cage and pulley combination is a direct replacement for the stock derailleur cage
  • 12-tooth top pulley and 19-tooth bottom pulley
  • The oversized pulleys reduce chain articulation to lower mechanical resistance
  • A long tooth profile on the lower pulley affords better chain retention
  • Ceramic pulley bearings markedly lower drivetrain friction
  • Two year, guaranteed performance warranty on the bearings
  • The Kogel cage is the stiffest available, improving rear derailleur gear shifting
  • A chain catcher built into the cage around the lower pulley prevents chain jams
  • Easy installation right out of the box
  • Designed for use with Shimano GRX 2x and Ultegra RX800 Di2 and mechanical 11-speed rear derailleurs and up to an 11-42 cassette
  • Also compatible with 1x setups but the gear shifting will be a little less crisp on account of a larger top pulley to smaller sprocket spacing


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