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Old 16.04.2015, 11:22
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Question about bicycle tires

My neighbor purchased a set of bicycle tires from China via Alibaba.
He ordered 27.5 x 2.0 and the tires that he received have that size on them however they seem very narrow.

The two tires display INNOVA-PRO tire brand. The tire are market as being 2.0 wide however measurements show they are 1.6 width which is 100 mm smaller than the permitted tolerance (+/- 3 mm).

The permitted tolerance is +/- 3 mm so it possible for a 2.0 tire to be 4 cm wide? must be counterfeit?

I suspect that the china tires are a mislabeled counterfeit product.

Last edited by bigfujitsu; 11.12.2015 at 22:19.
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Old 16.04.2015, 11:33
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Re: Question about bicycle tires

Your neighbour has probably ordered a non compatible type of tire,

http://en.wikipedia.org/wiki/Bicycle_tire

http://en.wikipedia.org/wiki/Europea...l_Organisation

Has he actually fitted the tire yet? Has he inflated it to the correct pressure?

When you consider a tire manufacturer has to make a mould for the tire, would a counterfeiter make a mould with the wrong dimensions?

.

Last edited by Sbrinz; 16.04.2015 at 12:23.
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Old 16.04.2015, 11:42
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Re: Question about bicycle tires

Hi Bigjujitsu and neighbour

Looks like your going for MTB tyres, 27.5 and 2.00, these cost so little and are the only bit of rubber connecting the road and your life !!!

Its not worth the effort to get super cheap.

Have a look at bike-import.ch, these guys have a very good range of tyres, all branded, and if you want, there are last seasons left overs often sold at discount.

Swalble, Smart Sam
W 100 11100791.01
Weight re-weighed: 678.00g Drahtreifen 27.5*2.10
27.5Zoll 54-584 Dual 2.0-4.0Bar 67tpi Performance Immediately
(+ 15 Item)Available for delivery immediately from warehouse bike-import.ch
More than 15 pieces in stock
1 CHF 17.90 / Piece
MSRP: CHF 24.90 / Piece
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Old 16.04.2015, 11:57
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Re: Question about bicycle tires

The tires are probably designed to run at half pressure and will squash out laterally, under load ..... then get out your tape measure.

It may just be a case of new, tight rubber - once ridden it, it may well sort out.

As Mr. Humphreys used to say: "It should ride up with wear".
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Old 16.04.2015, 15:09
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Re: Question about bicycle tires

If you pay peanuts, you get monkeys.......a good set of tires makes your ride more enjoyable and safe, and hardly costs a fortune, even in switzerland
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Old 16.04.2015, 16:24
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Re: Question about bicycle tires

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If you pay peanuts, you get monkeys.......a good set of tires makes your ride more enjoyable and safe, and hardly costs a fortune, even in switzerland
I think he paid 50chf for 2 tires. They are extremely light. Only 350 grams each. however the size marking must be off by a lot which makes me suspect...
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Old 16.04.2015, 17:04
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Re: Question about bicycle tires

Its like Jeans sizes.. One companies 36" is anothers 38"

The master of bikes himself explains it here http://sheldonbrown.com/tire-sizing.html
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Old 16.04.2015, 21:34
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Re: Question about bicycle tires

His explanation about "Dishonesty in Sizing" is very interesting; however we are not in the '70's and '80's. Bicycles today are more advanced and cost more than a house in the '70's and '80's...

the diameter of tires re set in stone, and the width only permits +/- 3mm


"Dishonesty in Sizing
Competitive pressures have often led to inaccuracy in width measurement. Here's how it works: Suppose you are in the market for a high performance 700 x 25 tire; you might reasonably investigate catalogues and advertisements to try to find the lightest 700-25 available. If the Pepsi Tire Company and the Coke Tire Company had tires of equal quality and technology, but the Pepsi 700-25 was actually a 700-24 marked as a 25, the Pepsi tire would be lighter than the accurately-marked Coke 700-25. This would put them at a competitive advantage. In self defense, Coke would retaliate by marketing an even lighter 700-23 labeled as a 700-25.

This scenario prevailed throughout the '70's and '80's. The situation got so out-of-hand that cooler heads have prevailed, and there is a strong (but not universal) trend toward accurate width measurements."
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Old 16.04.2015, 22:02
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Re: Question about bicycle tires

Quote:
City Mountain, small teeth nails. Low resistance, the game weapon! Double cord structure, tread the middle layer with a stab! Suited city road mountain bike riding can be walking the countryside, dirt gravel road!

Cobra Skin 27.5X2. 0 (650B) Cobra ultralight 375g high-speed folding tire Super Specials recommend the most cost-mountain tire speed, lightweight, wearable, and long-distance race, city, light weight are suitable for off-road
http://www.aliexpress.com/item/HOT-I...459019361.html

And people still buy it but then complain.

ps. given the posting history of OP, I don't think it was "a friend"
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Old 16.04.2015, 22:17
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Re: Question about bicycle tires

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the diameter of tires re set in stone, and the width only permits +/- 3mm
Only the ISO sizings are.

Tom
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Old 17.04.2015, 10:53
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Re: Question about bicycle tires

Alibaba accepted his claim for counterfeir product and offered him a full refund.
I told him that I would list the tires for sale on the forum

Brand bicycle Tyres,brand bike MTB tires.top quality.light 360g,26/27.5inch

Super light 20 chf a piece?
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Old 17.04.2015, 11:23
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Re: Question about bicycle tires

no sense of humor

he has already burned them on the roof of our building. A lot of black smoke over Rapperswil. Is that legal?
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