Burgtec Shimano Direct Mount Oval Thick Thin Chainring
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Items available on our website are not always available in-store, some are only held by our suppliers. In-store items usually arrive 2-3 days after the order is placed (rural deliveries can take an extra 2 days). Items only held with supplier might take up to 5 days to arrive, depending on the supplier. Please contact us if you have specific questions.
“After over a year of testing we are pleased to release our Oval Chain Ring”
Does a mechanical advantage of increased gearing sound Interesting? If so read on.
Through research and testing of many different prototypes with varying amounts of Ovality we found 115% (from the top centre) to be the optimum.
This shrank the dead spot suitably and gave the same flawless chain retention and silence as our round rings. The shortening of the dead spot on the top and bottom of the power curve allows you to get back into the power phase of your crank rotation sooner.
The benefit of this is twofold; increased gearing on the downward stroke and faster crank speed to get the crank propelled back around into the power phase continually. This is a significant gain because virtually all studies into pedalling performance suggest that a minimum 80% of your power comes from the down ward motion. Mainly because much larger muscle groups are used for this motion. The physics sorcery essentially adds extra power in the down wards stroke for no extra effort by reducing the dead spot and adds a bigger gear for the now larger power phase in the downward stroke. Win win.
ONLY AVAILABLE IN 32T
All of our Chain Rings are + / - 2 Teeth so;
30T Has a combination of 32T Increased Power Phase and 28T Dead Spot
32T Has a combination of 34T Increased Power Phase and 30T Dead Spot
We would recommend sticking to the current sized round ring that you are currently using when selecting your Oval size.
- Thick Thin Tooth profile with Mud Bleed
- 10 11 and 12 Speed Compatible
- 115 Degree’s of Ovality
- Fully CNC Machined from 7075 Aluminium
30 Day Easy Returns
Items in new, unused condition in the original packaging can be returned for a refund within 30 days of the original purchase date. See our full returns policy.
Free shipping on orders $150+
Free Shipping on all orders $150+ anywhere in NZ. Orders ship within 3 business days of placing the order, but usually go out faster.
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