How to Choose the Right Hub and Spokes

Precision Ratchet Hubs

The AR1 vs SR1

We offer two distinct hub options, the AR1 and the SR1. Both hubs feature nearly identical freehub mechanisms and are machined to the same high standards.

For most riders, the AR1 is more than enough. It has been ridden in six UCI WorldTour races and has been ridden to victory in several others. We recommend the AR1 for most riders, as they are more versatile and cost effective. AR1 hubs can be used for both road and gravel riding.

For those who want the lightest wheelset possible, the SR1 hub can reduce weight by an additional 45 grams. It is for road cycling only.

SR1 Hub (Road)

AR1 Hub (Road/Gravel)

General Specifications

Weight: ~232 Grams

Weight: ~277 Grams

100kg Weight Limit

140kg Weight Limit

For Hyperlight and Ultralight Wheels Only

For Hyperlight, Ultralight, Road, Team Wheels

High Stiffness

Moderate Stiffness

For 4th Gen Carbon Spokes Only

For 3rd and 4th Gen Carbon Spokes

Centerlock Disc Mount

Centerlock Disc Mount (Optional 6-Bolt Adapter)

5-Axis CNC Machining

For 12*100mm, 12*142mm Thru Axles

Hubshell

Aerospace Aluminum Alloy

6061 Aluminum Alloy

Hard Anodized

Laser Engraved Decals

Labyrinth Seals to Prevent Water and Dust Ingress

Freehub

Aerospace Aluminum alloy

7075 Aluminum Alloy

F:20; R: 20 Spoke Count

Springs

Single Spring

Dual Spring

Wave Spring (prevents sliding between the rolling elements, minimizing friction, wear, and vibrations)

Coil Spring

Spokes & Wheelbuilding

For Replaceable Carbon Spokes with Non-Round Spokes Heads Only

2X/2X Front Wheel Spoke Pattern

2X/2X Rear Wheel Spoke Pattern

20H 1:1 Ratio Spoke Lacing

Freehub Mechanism

Star Ratchet Freehub Mechanism

36T Engagement Option

36/45/54T Engagement Options

PVD Low-Friction Coating (Eliminates Corrossion, Reduces Rolling Resistance, Increases Longevity)

Anodized

Axles

Hard Anodized

SR1 (Aerospace Alloy), AR1 (7075+6061)

Bearings

Steel & Ceramic Bearing Options

TPI(CEMA) Bearings (Tight tolerances for increased stiffness, improved seals for greater longevity)

S&S Bearings (Lowest rolling resistance)

Replaceable Carbon Spokes

3rd vs 4th Generation

All of our road and gravel wheels come with carbon spokes, which we feel is the future. Our 3rd and 4th generation carbon spokes.

3rd generation spokes are signifantly stiffer, providing the best power transfer. We recommend them for strong competitive cyclists and sprinters.

4th generation carbon spokes offer better compliance and are significantly lighter. We recommend them for most riders, as they offer a more comfortable ride feel and help with vibration dampening.