Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 4 - Jul 9
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
Burgtec Shimano Direct Mount Oval Thick Thin ChainringAfter 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
“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
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy