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Ratio Direct Mount Ring – 12 speed/13 speed

The Ratio Direct Mount Ring is a solid spiderless chainring, machined by Ratio in the Lake District and designed for the broadest possible compatibility;

  • Ekar* 13 speed
  • SRAM Eagle* 12 speed
  • SRAM Flattop* 12 speed
  • Shimano HG+* 12 speed chains

Our direct mount chainring uses either a SRAM 3 bolt or SRAM 8 bolt spline pattern and features an offset tooth profile for improved chainline.

View our Support page here. For more information, check our compatibility guide.

 

£70.00

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The Ratio Direct Mount Ring is a solid spiderless chainring, machined by Ratio in the Lake District and designed for the broadest possible compatibility;

  • Ekar* 13 speed
  • SRAM Eagle* 12 speed
  • SRAM Flattop* 12 speed
  • Shimano HG+* 12 speed chains

Our solid spiderless chainring features an asymmetric tooth profile that allows one roller to react all the load from the slack side of the chain. This helps manage the disengagement of the chain even when it’s stretched, and secures the lower span of the chain while freewheeling over rough terrain – preventing the “wave” behaviour that can otherwise cause the chain to jump off the teeth. At the tight side, the narrow-wide profile ensures the chain engages smoothly during pedalling and a chamfered seating curve helps to clear debris.

The tooth profile is adapted to engage with SRAM’s 7.9 mm Flattop* rollers without compromising the kinematics of standard 7.7 mm rollers.

Chainline – for the older 3 bolt SRAM cranks, the offset is 7mm. The newer 8 bolt versions have a 8.5mm offset. Both of these give a 45mm chainline for use on road cranks.

The spiderless Ratio Direct Mount Ring is designed and manufactured in the Lake District, UK from 7075 aluminium.

Weight: 34T – 75g, 36T – 85g, 38T – 90g, 40T – 105g, 42T – 110g, 44T – 120g

Bolts not included.

View our Support page here. For more information, check our compatibility guide.

*Campagnolo and Ekar are registered trademarks owned by Campagnolo. Shimano and HG+ are registered trademarks owned by Shimano. AXS®, DoubleTap®, eTap®, SRAM®,SRAM APEX®, SRAM EAGLE®, SRAM FORCE®, SRAM RED®, SRAM RIVAL®, X0®, X01®, XX1® are registered trade marks owned by SRAM, LLC. Eagle™, Exact Actuation™, GX™, NX™, SRAM APEX 1™, SRAM Force 1™, SRAM RIVAL 1™, S-series™, SX™, WiFLi™, X-Actuation™,  XD™, XDR™, XPLR™, XX™, Zero Loss™ are trademarks of SRAM, LLC.

Weight 150 g
Dimensions 20 × 20 × 2 cm
Chainring Size

34T, 36T, 38T, 40T, 42T, 44T

Packaging

To reduce waste we will send orders of over 10 units in bulk packaging rather than individual kit boxes. If you have ordered less than 10 kits but would also like to reduce the packaging of your bulk order or have any questions please email us at [email protected]. Equally if you would like the full packaging for orders of 10+ kits drop us a line too.

Large orders

If you wish to order more than 50 units please contact us directly via [email protected]

HS Code

HS87149630

Country of Origin

UK

Spline Pattern

SRAM 3 bolt, SRAM 8 bolt

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