Surly
Surly Single Cog
Surly Single Cog
In stock
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NZ‑Based Support – Talk to real riders who understand your needs. -
Secure Payments – Shop Pay, Google Pay, Apple Pay & major cards accepted. -
Warranty Protection – All bikes backed by manufacturer warranties. -
Easy Returns – Hassle‑free returns on unused gear.
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SURLY CASSETTE COG Our cassette-type cogs are designed to fit on standard Shimano compatible freehub bodies. These cogs have a tall tooth profile that is essential for preventing chain skip from the extra torque a singlespeed drivetrain encounters. In addition to being a stellar SS cog, the cog base width (where it contacts the freehub body) is 4.35mm, so you can stack a few of them up and use a 9-speed shifter for a simplified multi-speed drivetrain. This width also prevents it from ruining the freehub body as a result of digging grooves into it like skinny stamped cogs have a tendency to do. Surly cogs are machined from SCM415 CroMoly steel, then heat-treated for toughness and chrome-plated for surface hardening and enhanced chain lubricity. Our cogs will work with 6-9-speed 3/32" chains, although we recommend the inherently updated quality of an 8 or 9 speed chain. They are also available in every increment from 13-22t, so you can select that perfect gear. |
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Shipping
Shipping
Click & Collect – Free
Order online & collect at our Onehunga store.
NZ Shipping Costs
- General Items: $10/item
- Bikes & Frames: $120 (North Island) / $199 (South Island)
- Large/Bulky Items: $30 (North Island) / $60 (South Island)
- Helmets: $20 (North Island) / $25 (South Island)
Rural: Extra fee applies — select “Rural Delivery” at checkout.
International Orders – Contact info@rouleurcycles.co.nz for a quote.
Bike Shipping
- Fully assembled, tuned & safety‑checked before dispatch.
- Carefully boxed (minimal reassembly required).
- Recommend mechanic check before first ride.
Timeframes
- General: 3–5 working days (+1–2 for rural)
- Bikes: 5–7 working days (up to 10 remote) + prep time for build/boxing
- Delays may occur during holidays or courier disruptions.
Tracking & Issues
- Tracking emailed once dispatched.
- Contact the courier first for delays. Need help? Email or call us.
- Report damaged/lost parcels within 3 days.
No PO Boxes – Physical addresses only.
Why Buy From Rouleur?
Why Buy From Rouleur?
Trusted NZ Bike Experts – Locally owned & operated with years of experience helping Kiwi riders get the most out of their bikes.
Custom Builds & Personal Fitting – From road to e‑bikes, we tailor every build to your riding style and goals.
Fast, Reliable Shipping – In‑store stock ships next business day. Supplier stock delivered in as little as 3–5 days.
After‑Sales Support That Rides With You – From servicing to upgrades, our workshop team is here for the long haul.
