- Chainrings , Sprockets and Cassettes
- Burgtec Oval GXP Boost 3mm Offset Thick Thin Chainring
Burgtec Oval GXP Boost 3mm Offset Thick Thin Chainring
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 Burgtec 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.
All Burgtec 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
We aim to provide efficient delivery on all packages to mainland UK addresses. There are some areas where we will need to charge slightly more due to postage costs such as Highlands & Islands, Southern Ireland & Isle of Man.
Delivery is charged at £5.95 for standard delivery to UK mainland (see below for exceptions). Next working day delivery available for £6.95 if order before 1pm. Bikes are subject to £10.00 carriage charge. Exceptions can be found below. E-Bikes are subject to £30.00 carriage charge due to higher weight and value involved for insurance purposes.
Free delivery is available for orders over £75 and is a 2 working day service.
Orders placed before 12pm Monday to Thursday will be shipped the same day for next day delivery. Orders placed after 12pm Thursday and onwards will be shipped on Monday.
DUE TO THE CURRENT HIGH DEMAND, DELIVERY TIME FOR BIKES IS 7-10 DAYS. ALL PARTS AND ACCESSORIES ARE STILL 1-2 DAYS.
We use DPD for all our shipments:
DPD offer an excellent delivery service, with full tracking information and an hour time slot given on the day of delivery. You can also change the destination of your parcel, including local drop off points.
*Saturday delivery can be arranged at extra cost, please call for details.
SHIPPING EXCEPTIONS & SURCHARGES
Unfortunately due to the policies of our chosen shipping companies we regret that we will have to apply a separate charge to selected postcodes in the UK for some of our packages. If we need to apply this charge we will contact you after your order has been placed and work out the extra shipping charge. We do ship outwith the UK, please contact us for prices and options.
NORTHERN IRELAND POSTCODE SHIPPING EXCEPTIONS
Postcodes in Northern Ireland will carry a further charge for shipping, please contact for more details and prices.
ABERDEENSHIRE POSTCODE SHIPPING EXCEPTIONS
Postcodes in Aberdeenshire carry a further charge for large item shipping.
OUTER HEBRIDES POSTCODE SHIPPING EXCEPTIONS
Postcodes in the Outer Hebrides will carry a further charge for large item shipping, please contact for more details and prices.
INVERNESSHIRE POSTCODE SHIPPING EXCEPTIONS
Postcodes in Invernesshire carry a further charge for large item shipping.
KIRKWALL AREA POSTCODE SHIPPING EXCEPTIONS
Postcodes in the Kirkwall area carry a further charge for large item shipping shipping.
PAISLEY (WESTERN ISLES) POSTCODE SHIPPING EXCEPTIONS
Postcodes ranging from PA20 - PA80 in the Paisley & Western Isles will carry a further charge for large item shipping, please contact for more details and prices.
SHETLAND ISLES AREA SHIPPING EXCEPTIONS
Postcode within the Shetland Isles will carry a further charge for large item shipping, please contact for more details and prices.