Onyx BMX Ohm Hg-110/10mm Bolt-On Rear Hub

Onyx Ohm HG-110/10mm Bolt-On Rear Hub

Product Overview

The Onyx Ohm is a lightweight rear hub designed for riders under 120 lbs, featuring instant engagement and low drag. Available in 28-spoke configuration with optional centerlock disc brake, it accepts Shimano Hyperglide cogs and uses 10mm bolt-on axles for traditional BMX frames and forks.

Key Features

• Lightweight Design – 320g (11.3 oz) standard; optional EZO ceramic bearings and titanium bolts reduce weight by 30.7g additional
• Instant Engagement – Direct-drive sprocket engagement minimizes drag and delivers responsive power transfer
• Low Drag Construction – Optimized bearing and driver design reduces rolling resistance for efficient pedaling
• Shimano Hyperglide® Compatible – Works with standard Shimano-type cogs for wide drivetrain options
• 10mm Bolt-On Axle – Compatible with 3/8" bolt-on dropouts common on traditional BMX frames and forks
• Stainless Steel or Titanium Bolts – Optional upgrade to titanium fasteners reduces weight and increases corrosion resistance
• EZO Ceramic Bearing Upgrade – Optional upgrade reduces friction and rotational drag; saves 30.7g additional weight
• Centerlock Disc Brake Option – Available on 28-spoke version for riders using hydraulic or mechanical disc brakes
• Solid Hub Shell – Robust construction resists damage from chain contact and impacts
• 28-Spoke Configuration – Balanced spoke count for strength and lightweight design
• Anodized Black Finish – Durable coating resists corrosion and wear

Technical Specifications

• Hub type: Rear
• Axle diameter: 10mm
• Axle width: 110mm
• Attach style: Bolt-on (3/8" dropout compatible)
• Spoke count: 28
• Hub shell style: Solid
• Driver: Shimano Hyperglide® compatible
• Hub flange diameter (drive side): 47mm spoke hole circle
• Hub flange diameter (non-drive side): 37mm spoke hole circle
• Hub center to flange (both sides): 27.87mm
• Maximum spoke tension: 120 kgf
• Maximum bolt torque: 15 Nm
• Weight: 320g (11.3 oz) standard; 289.3g (10.22 oz) with ceramic bearings and titanium bolts
• Bolts: Stainless steel (standard) or titanium (upgrade option)
• Bearings: Standard sealed or EZO ceramic (upgrade option)
• Finish: Anodized black
• Disc brake: Centerlock option available

Compatibility & Ideal Use Cases

• Riders under 120 lbs – Designed specifically for lighter riders; weight-optimized construction
• Bolt-on frames and forks – 10mm bolt-on axle compatible with 3/8" dropout spacing on traditional BMX frames
• Shimano Hyperglide drivetrain – Works with standard Shimano-type cogs; wide cog selection available
• Chain tensioner systems – Requires chain tensioner(s) for proper chain alignment and tension
• Weight-optimized builds – Lightweight construction ideal for racing and trick riding
• Disc brake option – Centerlock system available for modern braking applications
• First-time riders – Purpose-built for entry-level and younger riders seeking reliable, lightweight components

Build Requirements & Compatibility

• Chain tensioner required – Bolt-on hubs require chain tensioner(s) for proper chain positioning
• Shimano Hyperglide cogs – Select cogs compatible with Hyperglide driver; verify tooth count and compatibility
• Bolt torque specification – Maximum 15 Nm bolt torque; over-tightening may damage axle or bolts
• 3/8" bolt-on dropouts – Verify your frame and fork feature 3/8" bolt-on spacing before ordering

Upgrade Options

• EZO Ceramic Bearings – Reduces drag and weight; additional cost applies
• Titanium Bolts – Lightweight fasteners with enhanced corrosion resistance; included with ceramic bearing upgrade

Important Notes

• Custom made to order with 5–7 week production time
• Final sale, non-returnable; select options carefully before ordering
• Ships direct from manufacturer in USA; may ship separately from other orders
• Anodized black only; color customization not available
• Maximum bolt torque 15 Nm; use calibrated wrench for proper installation
• Chain tensioner(s) required for proper drivetrain function

A - Hub Center To Flange Center, Non-Drive Side (mm)	27.87mm
B - Hub Center To Flange Center, Drive Side (mm)	27.87mm
C - Axle Width (mm)	110mm
Spoke Hole Circle Diameter, Drive Side (mm)	47mm
Spoke Hole Circle Diameter, Non-Drive Side (mm)	37mm
Spoke Hole Counts	24, 28
Spoke Tension	120kgf Max