Redshift
Redshift Seatpost Shims
Redshift Seatpost Shims
Low stock
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A seatpost shim lets you easily fit the 27.2mm diameter ShockStop Seatpost OR Dual-Position Seatpost into your larger seat tube.
DESCRIPTION
This shim will let you easily fit the 27.2mm Dual-Position Seatpost or ShockStop Seatpost into your larger seat tube. Just drop the shim in your frame's seat tube and insert the seatpost. Once installed, the shim is essentially invisible.
DETAILS
- Fits 28.6, 29.8, 30.0, 30.4, 30.9, 31.6, and 31.8mm outer diameter
- Fits 27.2mm inner diameter
- 100mm length spreads out clamping load along seatpost and frame
TECHNICAL SPECIFICATIONS
| WEiGHT | 27.2-28.6mm - 16 g 27.2-29.8mm - 30 g 27.2-30.0mm - 33 g 27.2-30.4mm - 36 g 27.2-30.9mm - 43 g 27.2-31.6mm - 52 g 27.2-31.8mm - 55 g |
| LENGTH | 100 mm |
FAQ
Can I use a shim to adapt to a non-round or "aero" seatpost?
Unfortunately, the seatpost shim is only designed to adapt our 27.2mm round seatpost to other larger round seatpost diameters (for example, 31.6mm or 30.9mm). If your seatpost is oval or "aero" shaped, then both of our seatposts are not compatible with your bicycle.
My bike has a 25.4mm seatpost. Do you have a shim for that size?
The short answer is no. Both of our seatposts are only available in 27.2mm diameter. Since that is larger than 25.4mm, it is not possible to use a shim to adapt the seatpost to your frame.
Shipping
Shipping
Click & Collect – Free
Order online & collect at our Onehunga store.
NZ Shipping Costs
- General Items: $8/item
- Bikes & Frames: $100 (North Island) / $120 (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.
