Tyre Size — Ducati Up North

16 Апр 2015 | Author: | Комментарии к записи Tyre Size — Ducati Up North отключены


Tech Library Tyre Size

A useful article from guest Larry Kelly of San Diego CA Shazaam!).

The issue of tire versus handling has been extensively here so I’ll try to sum it up.

tire sizes get larger year-to-year so it’s easy to that bigger is better. chassis design development is the reason larger tires can be to go fast, not the tire size by So it’s best to stay the recommended tire and rim size on a bike.

The size of the tire is by each bike manufacturer development testing of a new design. The develops their chassis and system components in combination the tires in order to balance traction, tread design, and handling design objectives. you bought your bike, you for a lot of development and testing costs, so carefully about what to take when making

It often will come to individual riding styles and preference so be critically honest your own riding capabilities and compared to others.

When you modify your you often need to reconsider tire needs. More generally means a larger is needed. If you decide to put on a larger then check the rim width by the manufacturer of the tire.

You should the manufacturers recommendation for rim size as the point in evaluating what’s for your bike’s handling and riding style. Put too wide a on too narrow a rim and obviously you changing the intended profile so the tire more — or less round, perhaps making it out faster in the center, roll or make it more difficult to get in the corners.

But that aside, you can fit several tire sizes to the size rim. Another issue to consider is front-to-rear of profiles and changes to the ride Be prepared for some design of your own since changes to settings will also be when used with tires.

Some tire are more sensitive to rim width others. Dunlop, for example, that their 180 slick fine with up to a 6.25 wide rim. In the past, Michelin and Dunlop have that a 5.5 inch wheel is for 160 through 180 tire widths.

Different tire manufacturers different rim widths for their

So the question might be would you have more cornering along with a heavier and slightly lower top speed or a quicker turn-in, less speed, but more speed on the Getting the power and braking to the through the larger contact of a larger tire needs to be against the handling degradation with a larger tire.

74X/9XX’s come with 5.5 rims standard, although 916’s did come with 6.0 rims from the factory. In to get the correct tire profile, the street tire size for 5.5 rims specified by the Pirelli and is 180/55 and for 6.0 inch rims 190/50.

The outside diameter of size tires is the same so a won’t require a rear height adjustment. The important is that the 180 is a 55 section meaning it’s height is 55% of the width The 190 is 50% of it’s width.

This means that the tire has a steeper profile, taller.

When you mount a 190 onto a 5.5 inch rim it’s becomes slightly incorrect. The rim forces the tire’s outer inward into a tighter so that you can’t use this of the tire effectively. A correct profile creates a correctly-shaped contact patch essential to handling, better sidewall with less tire and, and better overall wear.

When developing the for the 916, Ducati had World racing in mind so when sold models for the street decided to mount 190/50 to 5.5 inch rims, a good for stable handling. It’s pointed out that WSB Ducati’s used 19/67 race roughly equivalent to a 190/60 tire. So, we got the wide tire without the quicker turn-in characteristics of the 60 section race

In the 1995 916 owner’s manual, specified the 180/55 as an alternative to the and the bike’s under-seat specification also listed both as recommended.

It wasn’t too long buyers figured out that from the 190/50 to the 180/55 a very noticeable change in feel. The 180’s, mainly of their taller, steeper turn-in much quicker and So eventually the word spread, and who has changed to the 180’s has praised its effects on handling.

Ducati 60

The lower and slightly lighter 748’s from the factory with

Keep in mind that, as any tire wears, the center wears down more than the sides, so a 55 section will drop to an equivalent 50 over the life of the tire. the turn-in handling gets as the tire looses profile. partially explains the rejuvenating that a new set of tires will on a bike’s handling, and will you an idea as to the magnitude of the effect of to a taller section tire.

of the perceived handling difference are attributing to size effects is due to the that they have a brand new 180/55 tire in of a worn 190/50 on a 5.5 inch

A 180 tire is also slightly This will account for of the subjective handling improvement when moving from a 190 tire. The weight difference brands is greater, especially for the tire. For example, 120/70 Pirelli Supercorsa’s (8 lbs. 6 Dunlop D207RR (10 lbs.

7 A 2 pound lighter tire reduce rotational inertia by the order of magnitude that you get switching from an aluminum to a wheel.

The 190 size is somewhat because of the shorter profile. results in increased grip and the tire carcass flex feedback), making accelerating out of turns less scary. if you reduce tire size, the same horsepower you’re to stress the tire carcass

This however hasn’t a problem, even with the powerful street bike

The bottom line here is if you the handling of a NEW 180/55 mounted on a 5.5 rim back-to-back with a NEW 190/50 on a 6.0 rim you’ll be hard pressed to the difference on a stock bike on the street.

Extract from this at Speedzilla

Please note Ducati-UpNorth.com cannot accept any for the accuracy or content of this Visitors who rely on this do so at their own risk. If you are unsure worth contacting your Ducati dealer who will be to help.

Do not attempt a repair or if you do not have the correct tools or to do so.

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