DESCRIPTION
“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 pedaling 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.
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.
Features:
- Thick Thin Tooth profile with Mud Bleed
- 10 11 and 12 Speed Compatible
- 115 Degree’s of Ovality
- Fully CNC Machined from 7075 Aluminium
- Using on a E-Bike?, please look at the steel E-Bike Chainrings
PLU: 71709
SIZE INFORMATION
SHIPPING & DELIVERY
Delivery Time Frames
Normal delivery
In-store items are shipped in 2-3 business days (weekdays) from payment. Please allow up to an extra 2 days for rural delivery. Orders placed after 3pm are not processed or dispatched until the next business day (weekday).
From Supplier
Items from most suppliers are shipped within 2 to 4 business days. Certain suppliers, can take up to 8 business days to ship, see the estimated delivery times on the product page for further info. If you are rural please allow up to an extra 2 days for delivery.
Tracking Information
You'll receive a tracking number once the order has left to ensure you know where this is every step of the way. If you haven't received this within your expected delivery time then please contact us to confirm.
Shipping Bikes
Giant, LIV and Norco branded bikes cannot be shipped. They must be picked up at the store. This is part of their warranty conditions and Pushbikes dealer agreements. We're happy to process the order through the website, but you'll need to collect the bike fully assembled in-store.
All electric bikes are unable to be shipped due to the weight and lithium batteries being classed as Dangerous Goods. The shopping cart will only give 'Click & Collect' options for these.
Bikes that are shippable are generally charged at $25.00 for kids bikes and $75.00 for standard bikes. This will automatically calculate at the checkout.
We withhold the right to adjust the freight charge for any bikes that fall outside of this criteria, on a case by case basis, please contact us if you would like further info on shipping a bike.
Processing of bikes can take up to 7 days if they are needing to be shipped from our suppliers.
Free Freight
We offer free freight on all orders over $130.00 in value*, and only $7.20 for orders under this. Regardless of the size and weight of your order we want to deliver the best value with no hidden fees. *This excludes larger items, which are charged at a rate of $25.00 to $100.00 dependent on size and weight. Rural addresses include a rural delivery fee.
Larger Items
Larger and or bulky items which carry more weight, like, bike racks, smart trainers and wheels, are charged at a starting rate of $25.00 up to $100.00, dependent on size and weight. This will automatically calculate at the checkout.
Click & Collect
Order online and collect from either of Pushbikes stores. If you're wanting to collect your order in store, please note that some items are drop shipped from our suppliers, and may not be ready for collection straight away.
Pre-Ordered Items
Delivery time frames for Pre-Ordered items are an estimate on the delivery window given buy our suppliers or logistics agent. Currently due to Covid-19 related delays dates can change, if this happens we'll contact you to advise. Items are shipped or completed ready for 'Click & Collect' once they become available.
Returns and Warranty
You can read Pushbikes return and warranty policy here.
Questions
Please contact us with any questions.
REVIEWS & QUESTIONS
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