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| 18" wheels. http://www.ducatittandf1.com/viewtopic.php?f=10&t=11521 |
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| Author: | Richo [ Tue Mar 07, 2017 5:33 am ] |
| Post subject: | 18" wheels. |
Hi all, Looking to fit some wider 18" rims to my TT2 race bike. I was thinking 18x2.5 front to allow for a 110/80 tyre, and 18x3.5 rear to allow for 130/70 tyre. Couple of questions; Am I on the right track RE tyre sizes? And are there any options other than the Marvic or PVM wheels? Or a preference between the two? Anybody with some they no longer require after changing to 17"s?? Thanks once again in advance, Cheers, Richo. |
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| Author: | e.ducati.on [ Tue Mar 07, 2017 4:46 pm ] |
| Post subject: | Re: 18" wheels. |
Dymag still offer the original H-section wheels in 18" sizes. Matt |
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| Author: | pantah_good [ Tue Mar 07, 2017 5:07 pm ] |
| Post subject: | Re: 18" wheels. |
And Marvic offers both Campagnolo and Morris style magnesium alloy wheels in your sizes. What brand of tire are you thinking about? http://www.marvic.it/en/moto-vintage-2/ |
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| Author: | Richo [ Wed Mar 08, 2017 6:29 am ] |
| Post subject: | Re: 18" wheels. |
I was thinking Continentals, but they won't fit on my current rims... |
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| Author: | pantah_good [ Wed Mar 08, 2017 1:44 pm ] |
| Post subject: | Re: 18" wheels. |
I'm not seeing a 130/70-18 in the ContiRoadAttack 2 CR race tire list. They do list two 130/80-18 rears, one with reinforced carcass and one without. I have experience with Avon 110/80-18 front and 130/70-18 rear vintage race tires on my R90S with 2.5" and 3.5"-18" rims. I never particularly liked the Avon 130/70-18 rear, I think the 70 series was a little too low a profile for a more classically designed chassis. Maybe a little more modern Pantah type chassis would be better suited for a 70 series rear? If I was buying new 18" vintage race tires for myself, I would strongly lean towards the Conti 110/80-18 and 130/80-18 and then check with Continental tech support to see if they would recommend using the "C" (reinforced carcass) version of the rear. Avons are good, but I like the fact that the Conti's are radials. As for wheels, I would urge they be properly suited to safely run tubeless. Bill |
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| Author: | Richo [ Wed Mar 08, 2017 4:25 pm ] |
| Post subject: | Re: 18" wheels. |
Thanks very much for your reply Bill, My mistake, I was thinking the Continental 130/80 rear (head full of different manufacturer's tyre sizes..) So, I'm assuming that "safe to run tubeless" means new?? Does that leave me with the Marvic/PVM/Dymag (Thanks Matt) selection, or is there a slightly, er, less expensive option? Is there something Japanese that can work without too much trouble? Thanks very much for your replies, just the experienced information I'm looking for to avoid expensive mistakes... Cheers, Richo. |
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| Author: | e.ducati.on [ Wed Mar 08, 2017 5:40 pm ] |
| Post subject: | Re: 18" wheels. |
In the era when the Japanese manufacturers were installing 18” wheels, rim widths were considerably narrower than your target sizes. 1.85” or 2.15” widths were typical. Also, many of the front wheels were 19”with 18” rear. Then the fad went to 16“ fronts for a while with slightly wider rears. Then 17” radial tires were introduced and few 18”/19” sizes remained on performance oriented models. Racers of the day often changed to spoke wheels with wider aftermarket rims but I doubt you’re considering that option. Off hand, I can’t think of any Japanese options that would have the rim widths you’re considering. If you were a “have” and could afford wide cast wheels to run 18” racing slicks, your options were Morris, Dymag and Campagnolo (PVM, EPM and Marvic came a bit later and made 18” wheels for a short while). The “have nots” put wider rims on their spoke wheels. Bottom line is, there probably aren’t any Japanese production 18” wheels you could adapt for your purpose. Even the large displacement models of European manufacturers during the 18” wheels era didn’t get any wider than 2.75” widths. BTW, EPM is still in production apparently and offer aluminum wheels as well as magnesium. “safe to run tubeless” means the rim has a bead retention profile. If magnesium, the wheel should be sealed to prevent pressure loss through porosity. Matt |
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| Author: | pantah_good [ Wed Mar 08, 2017 6:08 pm ] |
| Post subject: | Re: 18" wheels. |
Newish, or new enough to have the tubeless safety bead and a decent boss for mounting the valve. Tubes add unsprung weight. Newer magnesium is always better than older magnesium, although track surfaces are normally pretty smooth so you can get away with older stuff. Wheels that come Ducati Pantah ready will save you HUGE headaches with mounting brakes, cush drives, etc. Newer, good, light weight wheels are expensive, but I recommend getting absolutely the very best wheels you can possibly afford, right at the start. You won't regret it. |
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| Author: | brad black [ Thu Mar 09, 2017 1:41 am ] |
| Post subject: | Re: 18" wheels. |
things like fzr250, zxr250, kr1s, etc had 18 rear for the radials, but they're all 4". |
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| Author: | Richo [ Thu Mar 16, 2017 5:16 am ] |
| Post subject: | Re: 18" wheels. |
Thanks everyone for your replies. Much appreciated. |
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