Zipp 1ZERO HITOP S Disc Brake 6-Bolt 29" Wheel - Rear

$750⁰⁰

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Color

Black

Compatibility

Microspline XD Driver

The Zipp 1ZERO HITOP S Disc Brake 6-Bolt 29" Wheel - Rear typically ships in 5-8 business days

Zipp | SKU: 00.1918.722.001 | Option: Black, Microspline

This product is HSA / FSA eligible

Pickup available at RA Cycles - Brooklyn

Usually ready in 24 hours

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Zipp 1ZERO HITOP S Disc Brake 6-Bolt 29" Wheel - Rear Info

Modern cross-country racing doesn't happen on smooth, groomed courses anymore, and the Zipp 1Zero HiTop S Disc Brake 6-Bolt 29" Wheel - Rear is built around that reality. Rather than chasing stiffness above everything else, Zipp designed the 1Zero HiTop S to comply with rough terrain — roots, rocks, and repeated hits — while still carrying speed on the smooth sections, and to hold up on trail bikes with up to 130mm of travel rather than pure XC race bikes alone.

The rim is carbon, built hookless with a 21.2mm depth, a 30mm internal width, and an asymmetrical profile. Zipp's proprietary HiTop layup technology is what gives the rim its compliance — the carbon is engineered to flex slightly under repeated trail impacts rather than transmitting every hit straight into the rider, which is the difference between a wheel that feels alive on rough ground and one that just feels stiff and jarring. The rim's winged top profile gives the tire a smoother resting surface against the rim bed, which reduces the chances of pinch flats when the tire compresses hard against a rock or root.

This rear wheel runs Zipp's ZM 900 SL hub, built with 52 points of engagement for quick power transfer out of corners and off the line — a meaningfully higher engagement count than many trail hubs, which matters when you need the drivetrain to respond immediately rather than a fraction of a second late. The hub uses steel cartridge bearings and is available with either a Microspline or SRAM XD driver body, so it can match either major drivetrain ecosystem without needing an aftermarket conversion. The wheel is built for 6-bolt disc brakes rather than a Center Lock interface, which keeps rotor compatibility simple for riders already running 6-bolt rotors on the rest of their build.

Tire compatibility runs from 47c up to 71c on ISO/TSS-compatible tubeless tires, run with either tube or sealant, and the rim is rated to a maximum tire pressure of 50 psi. Zipp rates the wheel to a maximum system weight of 286 pounds (130 kilograms), giving real margin for heavier riders or loaded trail setups. The wheel is also compatible with Zipp's TyreWiz tire pressure monitoring system, though TyreWiz itself is sold separately and isn't included with the wheel.

Backed by Zipp's lifetime warranty, the 1Zero HiTop S rear wheel is built for a cross-country or trail rider who wants genuine compliance on rough terrain without giving up the low weight and quick engagement that make a wheel feel fast. Sold individually as a rear wheel, it's suited to riders replacing a single wheel or building a front-and-rear pair to their own specification rather than buying a fixed matched set.

The RA Perspective

The 1Zero HiTop S is Zipp's answer to a real shift in how XC courses are built — fewer smooth double-track climbs, more roots and rock gardens that punish a wheel built for stiffness alone. The HiTop carbon layup genuinely changes how the wheel feels on repeated hits; it's not just marketing language for a rim that flexes a little more than older XC wheels.

The 52-point engagement on the ZM 900 SL hub is the detail that stands out most in real riding. On technical, punchy trail sections where you're constantly starting and stopping pedaling, that quick engagement means power gets to the ground almost immediately rather than a half-pedal-stroke later — which adds up over a full lap or a long ride.

Because this is the 6-bolt version, make sure that matches your existing rotors and calipers before ordering — Zipp also sells versions of this wheel with different brake and driver-body configurations, and 6-bolt isn't universal across the line. Buying the wrong configuration is an easy mistake to avoid by checking compatibility first.

We'd point this wheel at a cross-country or light trail rider who wants a genuinely compliant carbon wheel for rough courses, and who's either replacing a single damaged wheel or building a specific front-and-rear pairing rather than buying a pre-matched wheelset.