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Item # SHI00AQ

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  • Black, Shimano/SRAM 11 speed ($199.95)
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Item # SHI00AQ

Everyday miles.

Your pricey carbon wheels have one job: to get you to the finish line faster during race season. With this knowledge, and since you probably spent a sizeable amount of money on them, we don't blame you for not wanting to take your carbon wheels outside when conditions are less than ideal. Shimano's RS21's won't be the fastest wheelset you put on your bike, but they're solid, capable training wheels that can handle salt on the roads or heavy rain without issue. If bad weather actually forces you inside completely, you can leave your carbon hoops pristine by using the RS21's on your trainer or rollers. They're compatible with 10 or 11-speed cassettes, with a quick-release free hub design and a 16/20 spoke count, and Shimano includes an indicator to allow you to keep track of how much wear the rims have as you rack up the base miles.

Tech Specs

Rim Material:
Wheel Size:
700 c
Tire Type:
Rim Depth:
[front] 21 mm, [rear] 24 mm
Rim Width:
20.8 mm
Brake Compatibility:
Spoke Count:
16 / 20
Wheel Bag Included:
Recommended Use:
road cycling
Manufacturer Warranty:
2 years
Actual Weight:
Black, Shimano/SRAM 11 speed: 1830g

Reviews & Community


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great value

  • Familiarity: I've put it through the wringer

I switched from a sealed bearing wheelset back to these bearing & cone shimanos and after break in period they are way faster. These are a great buy with the trickle down from Shimano's other lines.

Very nice, great price.

  • Familiarity: I've put it through the wringer

These wheels came dead true, and spin smooth and long. I opted for these wheels over some other brands because of the unbeatable price. I am mostly happy with them so far. On my scale, the wheelset weighed in at 1887 grams without skewers. Not super light, but the rims seems quite strong. In fact, the rims are my favorite aspect of the wheels. Strong, great breaking surface with a wear indicator, and rear rim is offset which supposedly makes it stronger, and they look pretty cool. The sticker on the rim is reflective which is nice since I ride in the dark and on my old wheels I had taped up my rims with reflective tape. The hubs look cool with their straight pull spokes. I don't know much about the advantages or disadvantages of straight pull spokes, but they look cool. The front hub rolls butter smooth and the wheel spins forever. The rear wheel doesn't spin as long but hey, it has a lot more grease for the bearings to roll through with the freehub and all, and rear wheels never spin as long as the front. My 10 speed shimano cassette went on with the provided spacer flawlessly. The freehub has a pretty standard shimano sound - not loud, not silent.
I have a few hundred miles on the wheels now. My immediate reaction upon my first ride was that they felt super smooth. I noticed decreased effort and increased acceleration on climbs. On flats I increased average speed by 1mph. On descents I couldn't really tell a difference. Another thing I noticed is that they are not as stiff as my old stock wheels. They have a bit of flex, although I may be a bit heavy for these wheels. Once, against my better judgement, I attached my bike trailer and pulled around my twin girls for an hour or so (total trailer weight was about 75 lbs). After that ride, my wheel was out of true. I guess my old wheels were tanks, because this never happened before. I'll be using the mt. bike to pull them around from now on. The plus side was that the wheel was extremely easy to true up. 15 minutes using 1/8th turns on the spoke wrench got the wheel back to perfect. The bladed straight pull spokes have a tendency to turn with the nipple as you adjust them so you have to keep an eye out that they stay aero, and not sideways.
All in all, quite a good wheelset, for an incredible price. Definitely a good upgrade for me.

Shimano RS21 Wheelset - Clincher , will they work on a 10sp campi

I believe that requires a different spline pattern on the freehub. It will work with Shimano or SRAM.