Shimano RC3 (RC300) SPD-SL Road Shoes: BOA L6 Dial, Glass-Fibre Nylon Sole (£54.99)
The Shimano RC3 (RC300) is an SPD-SL road cycling shoe with a BOA dial closure, on sale at Tredz. We have not tested it. This page collects what Tredz lists and the current price.
Available now: Shimano RC3 (RC300) SPD-SL Road Shoes — £54.99 at Tredz (listed RRP £109.99), correct at time of writing, 31 October 2026.
What the retailer lists
- Closure: an off-set centre flap with a BOA L6 dial for quick adjustment.
- Upper: a perforated synthetic leather composite, with a surround-wrapping structure that reduces overlap.
- Construction: an integrated seamless midsole and upper.
- Sole: glass-fibre reinforced nylon for power transfer, with a low stack height and stainless steel pedal body plates.
- Cleats: SPD-SL, so it takes three-bolt road cleats.
- Sizes: men’s Euro 36 to 50 and women’s Euro 36 to 42, per the Tredz size chart.
Where it fits for triathletes
The points below are our reading of the listed features, not test results.
- Entry to SPD-SL. It pairs with SPD-SL pedals such as the Ultegra pedals we have reviewed. We have not tested the shoe.
- Sole. A nylon sole is a lower-stiffness option than carbon. Shimano says it is built for power transfer, and we have no flex figures.
- Price. At £54.99 it is £55.00 below the RRP.
Where to buy
Tredz lists the Shimano RC3 (RC300) SPD-SL Road Shoes at £54.99 at time of writing, and the link below goes to the same product page.
Related guides
See also the best cycling shoes for triathlon guide, the Shimano Ultegra PD-R8000 pedals review and the Giro Empire SLX II shoes review.
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