Description
Avon Whitewall Tyres ! The Blue is to protect the white wall it washes off with fairy and hot water
120/70-21 68V AV71 Cobra Front Tyre.
This tyre is new old stock DOT (2013-2015) and is a DA stamped tyre (see below)
This is why they are only £20.00
Tyres have been stored correctly, in a dark cool Warehouse ( this is why they are only £20)
Avon’s AV71 / 72 Cobra is one of the best known cruiser tyres on the market, and, having had good results with it on our Valkyrie some years ago, we decided to refresh our memory with a dual test: fitting the latest version to both our Rocket III and Harley V-Rod project bikes.
Not only are these both heavyweight cruiser contenders – they put down a lot of rubber-shredding torque too – around 150 lb/ft in the case of the Rocket. If the Cobra can cope with this test, we reckoned it can handle anything out there.
We ran the Harley for 400 miles and the Rocket for 800 for this initial review – and we’ll be updating this initial impression in due co
It might come as a surprise to learn that next to race tyres, cruiser rubbers are some of the most challenging to design. There are many reasons you’d really want to avoid a crash on a cruiser; older riders and the presence of much easily damaged bling to begin with. But if you wanna build a great cruiser tyre, the laws of physics are just not on your side.
Where sportsbikes have light weight and good geometry, cruisers are heavy and with weight distribution far from the theoretically ideal front-end bias.They have limited ground clearance and put the rider is a body posture where it’s harder to make refined control inputs
There’s more; with proportionately less weight over the front wheel, some people find cruisers more prone to following white lines or grooves. They also have larger rear brakes and this can more readily lead to lock up and fishtailing, especially in the wet.
Then there’s the matter of grip versus wear – an issue for any tyre. But cruisers have unique problems.They tend to be ridden on straighter roads and at mild lean angles, so there’s more risk of ‘squaring off’ from wearing away the centre of the tread. You might think that a harder centre compound and a softer edge one would be the answer.
But huge mass means that multi-compound technology just isn’t enough. The entire build of the tyre needs to be varied to cope with the conflicting demands of highway cruising and riding the curves. Just up-scaling a normal tyre won’t do. You gotta go right back to the drawing board
So how have Avon responded? Well, the first step was to create a strong carcass. Multiple belts including Aramid are used to allow the tyre to take a massive constant load of up to 660lbs.
More belts are used in the middle of the tyre, leading to greater rigidity at that point, so that wear is reduced while upright but the tyre remains supple and soft enough to deform when leaned over and, in doing so, smooch the road with a large soft contact patch. Yum.
A solid central groove is often found on cruiser tyres. This looks traditional and disperses water well, but can make the bike want to cling to white lines. Tradition was therefore abandoned in favour of a chevron-like tread, more like something you’d find on a sportsbike. This pattern also helps agility.
To allow a soft compound to be used but build in good wear characteristics, the tread is thicker than on most tyres – with deeper grooves. This is good news for your wallet.
DA refers to tyres that are considered “devalued” or have a Defective Appearance by the tyre manufacturer because of some visual flaw(s).
These tyres are considered technically sound in construction and operation and totally suitable for driving.
They carry the mark “DA” stamped on the sidewall. There should not be any issues during their usage.
Please Note:- Like most Whitewall tyres, these tyres may be coated in a blue protective gel to protect the whitewall,
to remove this gel after fitting simply wash the tyres in warm soapy water (do NOT use ANY other chemicals !)
– for thick/hard to remove areas you may need to agitate the gel with a soft nail brush
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