Zoom Hydraulic Disc Brake Calipers HB-100 Front & Rear Set - Strong

Our review of the Zoom HB-100 hydraulic disc brake caliper set finds it best suited for riders who want a clear upgrade from basic mechanical brakes without a full hydraulic overhaul. The kit combines a cable-actuated hydraulic design with dual-piston calipers built from high-grade aluminum alloy, offering durable construction and consistent modulation in wet or cold conditions. For mountain bikers, commuters, and e-bike owners seeking quieter, more controlled braking that resists rotor deformation, the HB-100 provides a pragmatic balance of performance and value.

Key Features

• Durable aluminum alloy: The caliper body is made from high-grade aluminum alloy to resist high temperatures and the effects of rain and snow, so it holds up in harsh conditions.
• Dual piston design: Both pads actuate simultaneously to deliver even clamping force and reduce the risk of rotor warping compared with single-piston systems.
• Cable-actuated hydraulic action: The HB-100 uses built-in brake oil with a line-pull clamp for hydraulic-style modulation while still fitting many standard cable-actuated setups.
• Stainless steel rotors included: The package contains 160 mm 6-bolt stainless rotors that are light yet designed to provide strong stopping power and consistent modulation.
• Wide compatibility: The set is suitable for mountain, road, folding bikes, e-bikes, and electric scooters, making it a versatile upgrade option.
• Complete kit packaging: The pair ships with front and rear calipers (F160 R140 for front, F180 R160 for rear), two rotors, and titanium bolts for bolt-on installation.

Who It's For

The HB-100 is ideal for riders replacing basic mechanical calipers who want improved modulation and quieter operation without converting to a full hydraulic lever system. It fits well for commuters, light trail riders, and e-bike owners who need reliable stopping power in mixed weather.

Less suitable are riders who demand race-level braking or those who want fully sealed hydraulic lines and lever-integrated systems. If you need the absolute highest heat capacity for long downhill runs or a dealer-serviced hydraulic system, a dedicated hydraulic setup is a better choice.

Pros & Cons

Pros

• Improved braking performance and quieter operation compared with many mechanical calipers.
• Durable aluminum construction and stainless rotors that endure wet and cold conditions.
• Dual-piston design gives even pad contact and helps prevent rotor deformation.
• Includes rotors and titanium bolts for a near-complete fitment out of the box.

Cons

• Stopping power is mixed in some user reports, so riders expecting top-tier hydraulic force may find it modest.
• The cable-actuated hydraulic approach may not match the serviceability or feel of a full hydraulic system for all users.

Specifications

Product type	Cable-actuated hydraulic disc caliper set
Caliper construction	High-grade aluminum alloy
Piston configuration	Dual piston (two-way braking)
Rotors	2 x stainless steel 160 mm 6-bolt
Center distance	44 mm
Package contents	1 pair calipers (F160 R140 front, F180 R160 rear), 2 rotors, 12 titanium bolts

Our Verdict

The HB-100 caliper set is a practical, cost-conscious upgrade for riders moving up from basic mechanical brakes who want quieter operation and better modulation in wet conditions. It pairs durable materials and a dual-piston design with included rotors for strong everyday performance, though riders seeking race-level stopping or a fully hydraulic lever system should consider other options.

Frequently Asked Questions

Will these calipers fit my bike?
They are compatible with many mountain, road, folding bikes, e-bikes, and scooters, but you should verify rotor size and mount spacing against your frame and fork.

Are the rotors included?
Yes, the kit includes two 160 mm stainless steel 6-bolt rotors and titanium bolts for mounting.

Do these require hydraulic fluid bleeding like regular hydraulics?
The HB-100 is cable-actuated with built-in brake oil in the caliper block, so it differs from full hydraulic systems and does not require the same bleeding procedure.