Ratio Makes a 34 Tooth GRX Chainring

Key Takeaways

• Ratio offers 34‑tooth chainring for Shimano GRX.
• Only 34‑tooth GRX option currently available worldwide.
• Machined in‑house from 7075 aluminium, twice 6061 strength.
• Fits 11, 12, 13‑speed chains; compatible with Shimano, SRAM.
• Price £60 GBP (£66 USD), weights 48‑68g.

Summary

Ratio Technology has launched a new 4‑bolt 110 BCD chainring for Shimano’s GRX groupset, available in 38t, 36t, and a groundbreaking 34t size. The 34‑tooth option makes it the only GRX‑compatible chainring of that size on the market, addressing a gap for gravel riders seeking lower gearing. Manufactured in the UK from high‑strength 7075 aluminium, the ring uses Ratio’s proprietary tooth profile to work with 11‑13 speed Shimano and SRAM chains. It retails for £60 (£66 USD) and weighs between 48 g and 68 g.

Pulse Analysis

Gravel cyclists have long been constrained by Shimano’s GRX drivetrain, which traditionally offers only 40‑ and 42‑tooth chainrings. The lack of smaller chainrings forces riders to compromise on cadence and climb efficiency, especially in hilly terrain. Ratio’s introduction of a 34‑tooth option directly addresses this niche, providing a tighter gear ratio that improves power delivery on steep ascents while preserving the durability and shifting precision of the GRX platform.

Beyond the market gap, Ratio’s engineering choices reinforce its reputation for high‑performance components. The chainring is machined from 7075 aluminium, a material roughly twice as strong as the more common 6061 alloy, delivering a lightweight yet robust solution. Leveraging tooth‑profile research from the University of Cambridge, the ring maintains optimal chain engagement across 11, 12, and 13‑speed chains, ensuring compatibility with both Shimano and SRAM offerings. This blend of material science and precision design reduces wear and enhances chain retention, crucial for the demanding conditions of gravel riding.

From a business perspective, the £60 price point positions the product as an affordable upgrade for enthusiasts, while the UK‑based manufacturing underscores a growing trend toward localized, high‑quality component production. By filling a clear performance void, Ratio may prompt larger OEMs to reconsider their chainring line‑ups, potentially spurring a wave of smaller‑size options across the industry. The move also strengthens Ratio’s brand equity, attracting a segment of riders seeking bespoke solutions without the premium cost of custom cranksets.