So... if I wanted to fit an imperial sized 4.75-17 tyre to a (tubed) rim
currently carrying a 130/80-17 would I be completely stupid?

The rim is specified as a 17M/C x MT2.75.

(E-Mail Removed) wrote:

> So... if I wanted to fit an imperial sized 4.75-17 tyre to a (tubed)
> rim currently carrying a 130/80-17 would I be completely stupid?
>
> The rim is specified as a 17M/C x MT2.75.

A 3" rim would be better, but no, not completely stupid, it'll be fine.

--
Krusty

Raptor 1000 MV 750 Senna Tiger 955i Tiger 885 Fantic Hiro 250

On Sun, 5 Sep 2010 19:27:26 +0100, (E-Mail Removed) wrote:

>So... if I wanted to fit an imperial sized 4.75-17 tyre to a (tubed) rim
>currently carrying a 130/80-17 would I be completely stupid?
>
>The rim is specified as a 17M/C x MT2.75.

If all of going need new tyres it might be worth doing a bulk order
and getting the distribution done at the same time as we do beers.

We'd probably be better taking that discussion to the 'A' list rather
than cluttering up this place.

Lozzo <(E-Mail Removed)> wrote:

> (E-Mail Removed) wrote:
>
> > So... if I wanted to fit an imperial sized 4.75-17 tyre to a (tubed)
> > rim currently carrying a 130/80-17 would I be completely stupid?
> >
> > The rim is specified as a 17M/C x MT2.75.
>
> According to my books your 130/80-17 is ok for the 2.75 rim, but a 4.75
> imperial size tyre is too wide for it. It ideally needs at least a 3.00
> rim and preferably a 3.50.
>
> A 4.75 tyre has a 100% aspect ratio and will be significantly taller
> than a 130/80, thereby incresing the overall diameter of the wheel and
> the circumference. You might even have probems with it clearing the
> shaft housing or chain, depending on what bike it's going on.

It's going on an XT660.

Surely the aspect ratio makes it taller rather than wider so whilst it
might (pretty sure it won't) foul the swing arm it shouldn't hit the
chain because it won't be any wider?

Guess best I can do is take some measurements. Don't really want to
**** about having another rim put on the hub.

(E-Mail Removed) wrote:

> Guess best I can do is take some measurements. Don't really want to
> **** about having another rim put on the hub.

After spending half an hour with the calculator it appears the 4.75
tyre is a tiny bit narrower than a 130 so it should be ok. I'd
previously consulted the tyre fitting bible I have here, that gives
maximum recommended sizes for different rims.

--
Lozzo
Versys 650 Tourer, CBR600F-W racebike in the making, TS250C, RD400F
(somewhere)
BMW E46 318iSE (it's a car, not one of those 2-wheeled pieces of shite
they churn out)

Lozzo wrote:

> (E-Mail Removed) wrote:
>
> > Guess best I can do is take some measurements. Don't really want to
> > **** about having another rim put on the hub.
>
> After spending half an hour with the calculator it appears the 4.75
> tyre is a tiny bit narrower than a 130 so it should be ok.

The actual sizes can vary massively with knobblies (which I assumed is
what we're talking about). Could be anywhere from 120 to 140 depending
on make. A potential problem with a tubeless road tyre, but not an
issue with a tubed knobbly.

--
Krusty

Raptor 1000 MV 750 Senna Tiger 955i Tiger 885 Fantic Hiro 250

On Sun, 5 Sep 2010 22:26:46 +0000 (UTC), "Krusty"
<(E-Mail Removed)> wrote:

>Lozzo wrote:
>
>> (E-Mail Removed) wrote:
>>
>> > Guess best I can do is take some measurements. Don't really want to
>> > **** about having another rim put on the hub.
>>
>> After spending half an hour with the calculator it appears the 4.75
>> tyre is a tiny bit narrower than a 130 so it should be ok.
>
>The actual sizes can vary massively with knobblies (which I assumed is
>what we're talking about). Could be anywhere from 120 to 140 depending
>on make. A potential problem with a tubeless road tyre, but not an
>issue with a tubed knobbly.

When I replaced the 3.50x18 on the rear of the TS185 with a 4.00x18,
it ripped lumps out of the chainguard.

Sounds like I'd pegged playing cards to the spokes.

Mark Olson <(E-Mail Removed)> wrote in news:J6-
(E-Mail Removed):

> On 9/5/2010 3:00 PM, (E-Mail Removed) wrote:
>> Guess best I can do is take some measurements. Don't really want to
>> **** about having another rim put on the hub.
>
> Wouldn't it be simpler to just buy the proper size tire in the first
> place than to re-string a new rim to the hub just because you happen
> to have a tire that's not the right size?
>
> Forgive me for being thick, but unless there's something very special
> about that tire, or you are poor, I don't understand why you want to
> put the wrong size tire on your bike. Generally speaking the OEM tire
> sizes are picked for good reason, and using different size tires on
> the OEM rims isn't an improvement.
>
>

once a farmer...


--
wessie at tesco dot net

BMW R1150GS

Mark Olson wrote:

> On 9/5/2010 3:00 PM, (E-Mail Removed) wrote:
> > >
> > > > So... if I wanted to fit an imperial sized 4.75-17 tyre to a
> > > > (tubed) rim currently carrying a 130/80-17 would I be
> > > > completely stupid?
> > > >
> > > > The rim is specified as a 17M/C x MT2.75.
> >
> > It's going on an XT660.
> >
> > Guess best I can do is take some measurements. Don't really want to
> > **** about having another rim put on the hub.
>
> Wouldn't it be simpler to just buy the proper size tire in the first
> place than to re-string a new rim to the hub just because you happen
> to have a tire that's not the right size?
>
> Forgive me for being thick, but unless there's something very special
> about that tire, or you are poor, I don't understand why you want to
> put the wrong size tire on your bike. Generally speaking the OEM tire
> sizes are picked for good reason, and using different size tires on
> the OEM rims isn't an improvement.

I'd guess he wants to put a proper knobbly on it for serious
off-roading, & a 4.50 ain't gonna cut it on an XT660.

--
Krusty

Raptor 1000 MV 750 Senna Tiger 955i Tiger 885 Fantic Hiro 250

Krusty wrote:
>
> Lozzo wrote:
>
>> (E-Mail Removed) wrote:
>>
>> > Guess best I can do is take some measurements. Don't really want to
>> > **** about having another rim put on the hub.
>>
>> After spending half an hour with the calculator it appears the 4.75
>> tyre is a tiny bit narrower than a 130 so it should be ok.
>
> The actual sizes can vary massively with knobblies (which I assumed is
> what we're talking about). Could be anywhere from 120 to 140 depending
> on make. A potential problem with a tubeless road tyre, but not an
> issue with a tubed knobbly.
>

Trelleborg army specials.


--
Alex
BMW R1150GS MZ Saxon 301
DIAABTCOD#3 MSWF#4 UKRMFBC#6 Ibw#35 BOB#8
Windy's "little soldier"