Tyres for Ambrosio rims

For discussions about bikes and equipment.
Post Reply
arnsider
Posts: 449
Joined: 27 Jul 2011, 12:44am
Location: Carnforth, Lancashire

Tyres for Ambrosio rims

Post by arnsider »

I recently fitted a 700 Ambrosio rimmed rear wheel to my E-bike. The new rim is 7 mm narrower than the old and the Schwalbe Marathon 700x35C tyre that I swapped over is very tight to fit and so far will not go on parallel, however many attempts.
The rubbing strip is all over the place. Can anyone recommend a loose-fitting folding tyre C32, 35? maybe a folder as I don't fancy trying to swap a punctured tube on the road!
Are the Panaracer Gravel tyres worth a try?
S2L
Posts: 105
Joined: 20 Feb 2019, 4:47pm

Re: Tyres for Ambrosio rims

Post by S2L »

Which Ambrosio rims?

Excursion, Evolution, Excellence?

The above are all narrow road rims, you can fit a 28 mm tyre typically, nothing bigger than that... ideally 23-25
Jamesh
Posts: 2963
Joined: 2 Jan 2017, 5:56pm

Re: Tyres for Ambrosio rims

Post by Jamesh »

I have p20 rims.

Tyres are a nightmare to fit.

I use wiggle kevlar which are tight but do go on. £10-15

I don't go far on these rims for that reason.

Cheers James
S2L
Posts: 105
Joined: 20 Feb 2019, 4:47pm

Re: Tyres for Ambrosio rims

Post by S2L »

The P20 are wide rims for road standards, you can fit any tyre size you like, more or less... certainly 32-35.

They are tubeless ready rims, hence a bit tighter fit for tyres
arnsider
Posts: 449
Joined: 27 Jul 2011, 12:44am
Location: Carnforth, Lancashire

Re: Tyres for Ambrosio rims

Post by arnsider »

Thanks all.
I have ordered a Panaracer Ribmo 32 wide folder.
Fingers (Cut and bruised) crossed!
User avatar
elPedro666
Posts: 1554
Joined: 9 Oct 2014, 7:38am
Contact:

Re: Tyres for Ambrosio rims

Post by elPedro666 »

https://www.ebay.co.uk/itm/Black-Bike-C ... 890.l49286

Bought one of these recently for fitting tight tubeless tyres, I haven't tried it yet though, so can't report anything useful other than it seems solid enough (think mine is BBB branded, either from Tredz or Tweaks iirc).

I'm a trendy consumer. Just look at my VOG-L09 using hovercraft full of eels.

arnsider
Posts: 449
Joined: 27 Jul 2011, 12:44am
Location: Carnforth, Lancashire

Re: Tyres for Ambrosio rims

Post by arnsider »

I am not the least expert on tyre types and wondered what a "Crotched" rim is.
I noticed this evening a note on my Schwalbe Marathon front tyre to the effect that these tyres can only be fitted to Crotched type rims.
Anyone know the differences?
ClappedOut
Posts: 585
Joined: 30 May 2020, 12:43am

Re: Tyres for Ambrosio rims

Post by ClappedOut »

Have you tried knocking bead into centre and pedal strap or cable ties to hold it.
Last marathons I fitted were difficult
User avatar
Paulatic
Posts: 7804
Joined: 2 Feb 2014, 1:03pm
Location: 24 Hours from Lands End

Re: Tyres for Ambrosio rims

Post by Paulatic »

arnsider wrote: 16 May 2021, 9:26pm I am not the least expert on tyre types and wondered what a "Crotched" rim is.
I noticed this evening a note on my Schwalbe Marathon front tyre to the effect that these tyres can only be fitted to Crotched type rims.
Anyone know the differences?
They mean crotched rims ( from the French for hook ) -

viewtopic.php?t=97483
Whatever I am, wherever I am, this is me. This is my life

https://stcleve.wordpress.com/category/lejog/
E2E info
User avatar
531colin
Posts: 16083
Joined: 4 Dec 2009, 6:56pm
Location: North Yorkshire

Re: Tyres for Ambrosio rims

Post by 531colin »

arnsider wrote: 16 May 2021, 9:26pm I am not the least expert on tyre types and wondered what a "Crotched" rim is.
I noticed this evening a note on my Schwalbe Marathon front tyre to the effect that these tyres can only be fitted to Crotched type rims.
Anyone know the differences?
Rim with a bead hook.
arnsider
Posts: 449
Joined: 27 Jul 2011, 12:44am
Location: Carnforth, Lancashire

Re: Tyres for Ambrosio rims

Post by arnsider »

Many thanks.
I take it that a "Bead Hook" is a fold in the rim edge that traps the tyre bead.
User avatar
531colin
Posts: 16083
Joined: 4 Dec 2009, 6:56pm
Location: North Yorkshire

Re: Tyres for Ambrosio rims

Post by 531colin »

arnsider wrote: 17 May 2021, 1:12pm Many thanks.
I take it that a "Bead Hook" is a fold in the rim edge that traps the tyre bead.
Yeah, a lip at the top of the rim sidewall.
arnsider
Posts: 449
Joined: 27 Jul 2011, 12:44am
Location: Carnforth, Lancashire

Re: Tyres for Ambrosio rims

Post by arnsider »

The Ambrosio rim built into my replacement wheel is patently unsuitable and is just the another nail in the coffin of my E bike saga.
The rim is not crotched and it's obvious now why I cannot get my Schwalbes on correctly.
I just do not understand why the wheel builder didn't consider rim width and tyre compatibilty. After all, we rely on cycle shops to advise and supply accordingly, or are the usual cynics on here going to wag their fingers at my "ignorance"
I suffer badly with thumb arthritis so you can imagine how hard it is to fit tight tyres.
In retrospect, I might have taken the tyre and tube to the wheel builder before he commenced!
Such is hind sight.
User avatar
531colin
Posts: 16083
Joined: 4 Dec 2009, 6:56pm
Location: North Yorkshire

Re: Tyres for Ambrosio rims

Post by 531colin »

arnsider wrote: 18 May 2021, 6:39am The Ambrosio rim built into my replacement wheel is patently unsuitable and is just the another nail in the coffin of my E bike saga.
The rim is not crotched and it's obvious now why I cannot get my Schwalbes on correctly.
I just do not understand why the wheel builder didn't consider rim width and tyre compatibilty. After all, we rely on cycle shops to advise and supply accordingly, or are the usual cynics on here going to wag their fingers at my "ignorance"
I suffer badly with thumb arthritis so you can imagine how hard it is to fit tight tyres.
In retrospect, I might have taken the tyre and tube to the wheel builder before he commenced!
Such is hind sight.
I recommended this approach in this thread viewtopic.php?f=5&t=145735

However, it seems to me that you know what you want from this wheel; you want a strong, wide rim which your tyres will mount on and off reasonably easily. If you made that clear to the wheelbuilder at the time then he hasn't followed your instructions.
The thread I linked talks about rims/wheels which are suitable for tubeless tyres. Now I don't know anything about tubeless tyres, and I'm not interested in learning a whole new load of stuff at my age; inner tubes have been OK for me all my life I know how they work and I can fix them when they fail. However, it seems to me (from my reading on here) that rims designed for tubeless are different to rims designed for tubes, and the tyres are very tight. Is it possible you have got a tubeless rim?
arnsider
Posts: 449
Joined: 27 Jul 2011, 12:44am
Location: Carnforth, Lancashire

Re: Tyres for Ambrosio rims

Post by arnsider »

I took the faulty MT 500 wheel to the wheel builder to swap over the disc and block, so he must have known by looking what he was being asked to replace.
I scoured the Ambrosio web page to try to identify the wheel I had from the section... That was a waste of time!
What I did find were a number of far more suitable rims.
I take the point about tubeless rims not being crotched and the one I ended up with may well be such.
Eyeing down the rim top I could not see any fold or thickening in the rim edge so I am satisfied it was not crotched.
Post Reply