SANTA CRUZ RESERVE 77 TURBULENT AERO 700C RIM

The Reserve 77 TA carbon rim is the front rim Santa Cruz Reserve designed for triathlon, time trials and flat terrain: a 77 mm profile, 25 mm internal width and a claimed 590 g. The goal here is not saving grams on the climbs but holding high speed for kilometre after kilometre in an aero position.

It is supplied on its own, with no hub or spokes, to build a custom TT front wheel or rebuild an existing one. It is not an SL version: the 77|88 series focuses on very deep profiles and a construction geared towards stability and speed rather than minimum weight.

A 77 mm profile: speed and control in the wind

• The Turbulent Aero programme grew out of two years of wind measurements on American roads, later replicated in the wind tunnel: the shape is optimised for real gusts and real angles of attack.
• In the 77|88 pairing the front stays shallower than the rear: 77 mm delivers a big drag reduction while keeping the steering manageable in a crosswind.
• The wide profile, 31 mm externally, suits modern tyres and works well with the recommended widths.
• Compared with 57 or 64 mm front rims, it gains speed on long, steady-paced legs where only watts and position matter.

Who the Reserve 77 TA is for

• Triathletes racing Olympic distance, 70.3 and Ironman who want a deep but still controllable front wheel.
• Time triallists and race-against-the-clock specialists.
• Riders who mostly ride on the flat and love high, sustained speeds.
• Reserve's recommended pairing: the 88 TA rear, for a complete 77|88 set.

Building and compatibility

• 24 holes and a 487 mm ERD for spoke calculation.
• Tubeless and clincher compatible, semi-hooked bead.
• Maximum pressure 100 psi (6.9 bar) or the tyre's lower limit.
• Disc brake rim with no brake track.
• Very deep profile: extra-long valves or extenders are needed, to be sorted with your mechanic during the build.

Why choose the Reserve 77 TA

• A front rim built for TT and triathlon, not an adapted road profile.
• Turbulent Aero design based on real wind data.
• 25 mm internal channel for wide, fast-rolling tyres.
• Reserve lifetime warranty with no rider weight limit.
• Ideal for building your own wheel around your favourite hub.

If your race is decided by pace and the clock, the Santa Cruz Reserve 77 Turbulent Aero 700C rim is the right front rim to start from: built by your mechanic onto the hub of your choice, it will carry you through every fast leg.