Deep wheels and the north coast wind: how to choose a rim depth you can actually ride

Every wheel brand will tell you deeper is faster, and in a wind tunnel they are right. The tunnel, however, does not ride along Route 681 in February with the trade winds coming off the Atlantic at your shoulder. We do, and this is the advice we give in the shop.

What depth actually buys you

Rim depth reduces drag most when the wind comes from ahead. As the wind moves around to your side — the crosswind angles we live with on the north coast — a deep front rim becomes a sail. Sail area is sometimes free speed; past a certain yaw angle, on a light rider, it becomes steering input you did not ask for.

The rear wheel tolerates depth far better than the front. That is why a disc rear is the one aero decision nobody argues about, and why the classic setup for our TT and tri riders is the deepest legal rear with a more moderate front.

The honest matrix

Rider weight matters more than anything the marketing mentions. At 85 kg you can ride a 58/65 through a gap in the palms and barely notice. At 58 kg the same gust moves you a foot sideways.

Our rules of thumb, refined by riding these exact wheels on these exact roads: under about 65 kg, treat 50 mm as a ceiling for the front unless the course is sheltered. Between 65 and 80 kg, a 42–52 mm front is the all-round sweet spot — this is where the No.6 42/48 earns its keep as the one wheelset for riders who want one wheelset. Above 80 kg, ride what the course demands; the wind bothers you least.

Climbing changes the answer

If your races are decided going up — and on this island a lot of them are — depth is dead weight. This is why the 28/28 exists at 1040 g: the depth disappears beneath you when the road tilts.

Ask us, honestly

Tell us your weight, your event and where you ride. We will tell you which pair, including when the answer is the cheaper one. We publish the weights we measure on our own scale; the same honesty applies to advice.