T-Cycle
Chain idler kit T-Cycle for Surly Big Dummy
Chain idler kit T-Cycle for Surly Big Dummy
SKU:1839
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- T-Cycle chain idler set for Surly Big Dummy
- Available for derailleur and hub gear systems in SPORT and ELITE versions
- Effectively prevents chain slap against the frame
- Less chain contact and scratches on mudguards
- Raised chain line keeps the drivetrain clean
- Significantly improved power transfer efficiency
- Near-silent operation and reduced vibration
- Material & Quality:
- ELITE: Titanium cog + high-quality Ceramic Hybrid precision bearings
- SPORT: 7075 Aluminium cog + high-quality ABEC7 precision bearings
- Precision CNC-machined and anodised components
Assembly instructions
Assembly instructions
Product information
Product information
Manufacturer
Importer
Description
TerraCycle Idler Kit for Surly Big Dummy
Contents
- 1x TerraCycle Power Idler
- 1x TerraCycle Return Idler
- 1x Stainless steel chain keeper
- 1x Bespoke Big Dummy frame clamp for diagonal tubes
Description
Optimise the performance of your Surly Big Dummy with this specialised idler kit from TerraCycle. This set has been specifically engineered to significantly enhance power transfer efficiency while increasing ride comfort through near-silent chain management. The centrepiece of the system is the frame clamp, custom-designed for the Big Dummy: it fits the diagonal frame tube perfectly, ensuring a secure, anti-twist mount in the precise factory position.
By upgrading to high-quality TerraCycle components, annoying chain slap against the frame is effectively eliminated. This not only reduces noise but also protects your frame’s paintwork from damage. Furthermore, the kit improves the chain line by slightly raising it, keeping the chain further away from the ground. As a result, your drivetrain stays cleaner for longer, shielded from road grime and moisture, which extends maintenance intervals and reduces overall wear and tear.
Specifications and Highlights
- Precision Fit: Custom CNC-machined frame clamp designed specifically for the diagonal tubing of the Surly Big Dummy.
- Premium Materials: Robust chain keeper made from stainless steel for maximum durability and corrosion resistance.
- Enhanced Efficiency: Noticeable improvement in power transfer thanks to high-performance, low-friction idlers.
- Silent Running: Near-total elimination of chain noise and drivetrain vibrations.
- Superior Protection: Effectively prevents chain slap against the frame geometry.
- Optimised Ground Clearance: A higher chain line keeps your drivetrain cleaner and safer from obstacles.
Why choose the Titanium (ELITE) Cog?
For frequent riders or those with high power output, we generally recommend the Titanium cog. Unlike aluminium, which will eventually show wear from the chain’s rollers after several thousand miles, titanium provides extreme durability. Especially in high-load drive systems, the ELITE version ensures that your chain management remains as efficient as it was on day one, saving you money on replacement parts in the long run.