Shimano made news this week expanding its hydraulic road disc brake offerings with the first iteration of its new flat mount hydraulic road disc brake caliper standard. The road-specific calipers are now available at Shimano 105 and Ultegra levels. Also announced were a new 10-speed Tiagra road group and the WH-RX010 road disc brake wheel set.
The BR-RS805 Ultegra and BR-RS505 105 calipers offer a clean, integrated look specifically developed for road bikes. The lower profile caliper is designed to improve aerodynamics while maintaining Shimano’s one-way bleeding and easy tool access. Both the calipers use new pads that are not compatible with mountain calipers.
The addition of 11-speed compatible mechanical shift levers that integrate with either of the new flat mount calipers as well as previous Shimano road disc calipers complete the system. The new levers have reach and free stroke adjustment as well as Vivid index shifting, and the same ergonomics of more expensive product.
Meanwhile, the new Tiagra 10-speed road group continues to trickle down features from the higher level groups. Highlights include expanded gear ranges with 2×10 and 3×10 options, an 11-34t cassette, new cranks, refined derailleurs and increased braking power. There’s also a higher leverage design front derailleur with braze-on support bolt for improved stability. The new cranks feature an offset, 110 bcd, 4-arm design with 3×10 and 2×10 gear options. In back cassettes options include 11-25, 12-28, 11-32 and 11-34. The new brakes are claimed to offer a 30 percent increase in brake power and better adjustability.
Finally, Shimano has further expanded its road disc wheel line with WH-RX010, which joins the more premium WH-RX830 and WH-RX31 wheel sets. The WHRX010 is Shimano’s third performance road disc brake wheel set on the market, and is designed to be an affordable all-around wheel for today’s modern road bikes featuring Centerlock rotor mounting, 11-speed compatibility and a versatile 23mm OD rim width. The WH-RX010 will retail for $300 per pair.