Re: [RBW] Re: Question on matching rim - tire width

2019-03-20 Thread Nick Payne
I've run both Schwalbe G-One 650b x 30 and Switchback Hill 650b x 48 tyres 
on DT Swiss XM401 27.5 rims, which have a 22.5mm internal width and 
according to DT Swiss are suitable for tyres up to 2.5" wide. To me, the 
handling has seemed fine with both sizes of tyre. I use the narrower tyres 
for Auxax events on sealed roads the the wider for rides combining both 
sealed and unsealed roads.

Nick

On Wednesday, 6 March 2019 01:56:25 UTC+11, esoterica etc wrote:
>
>
> Anybody have experience with narrower tires on wide rims? I’ve got 
> Velocity Cliffhangers which are optimally rated between 45-65mm, but I’d 
> like to try running tires between 38-43mm on them.
>

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Re: [RBW] Re: Question on matching rim - tire width

2019-03-20 Thread John McBurney
The velocity nobs rim is really good. Not pretty but sturdy, functional
wide and NO BS.

On Wed, Mar 20, 2019 at 5:47 PM Ash  wrote:

> All,  much appreciate your comments.  I learned a bunch of interesting
> details!  Thank you.
>
> I'm considering Dyad.  But I've also been told that the A23 OC makes for a
> stronger rim.  I have to call Rich sometime.
>
> The Quill rim has a staggeringly wider range (25mm - 47mm), but that's way
> more money than I'm likely to invest.
>
>
>
> On Sunday, 10 March 2019 15:18:25 UTC-7, Mark Anderson wrote:
>>
>> A wider-than-recomended tire is unlikely to blow off an undamaged rim due
>> directly to the weight of the bike.  That's not really how clinchers work.
>>
>> An important part of the upper limit on width from Velocity's perspective
>> is that very wide tires run at high pressures can lead to rim failure,
>> likely in the form of cracked webs and/or sidewalls.  If you are pumping up
>> those 50 mm tires to 90 psi, then you're probably out of spec. for the
>> Atlas rim.  You'd also be nuts to do so for any number of other reasons.
>> If you're using sane pressures for your weight (what, 25-35 psi? Less? I
>> haven't weighed that little since I was ten...), 50s on Atlas and 45s on
>> the A23 are probably fine structurally.  Just ride in the rain enough and
>> you'll wear out the brake tracks before fatigue failure wrecks the rim
>> anyway.
>>
>> One reason to use a wider rim on your prospective AHH is that (many)
>> caliper brake quick releases just open the brake a certain amount relative
>> to the operational setting.  Thus, the wider the rim, the wider the
>> inflated tire that can pass through the opened brakes.
>>
>> --
>> Mark Anderson in Chicago
>>
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[RBW] Re: Question on matching rim - tire width

2019-03-20 Thread Ash
All,  much appreciate your comments.  I learned a bunch of interesting 
details!  Thank you.

I'm considering Dyad.  But I've also been told that the A23 OC makes for a 
stronger rim.  I have to call Rich sometime.

The Quill rim has a staggeringly wider range (25mm - 47mm), but that's way 
more money than I'm likely to invest.



On Sunday, 10 March 2019 15:18:25 UTC-7, Mark Anderson wrote:
>
> A wider-than-recomended tire is unlikely to blow off an undamaged rim due 
> directly to the weight of the bike.  That's not really how clinchers work.
>
> An important part of the upper limit on width from Velocity's perspective 
> is that very wide tires run at high pressures can lead to rim failure, 
> likely in the form of cracked webs and/or sidewalls.  If you are pumping up 
> those 50 mm tires to 90 psi, then you're probably out of spec. for the 
> Atlas rim.  You'd also be nuts to do so for any number of other reasons. 
>  If you're using sane pressures for your weight (what, 25-35 psi? Less? I 
> haven't weighed that little since I was ten...), 50s on Atlas and 45s on 
> the A23 are probably fine structurally.  Just ride in the rain enough and 
> you'll wear out the brake tracks before fatigue failure wrecks the rim 
> anyway.
>
> One reason to use a wider rim on your prospective AHH is that (many) 
> caliper brake quick releases just open the brake a certain amount relative 
> to the operational setting.  Thus, the wider the rim, the wider the 
> inflated tire that can pass through the opened brakes.
>
> -- 
> Mark Anderson in Chicago
>

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[RBW] Re: Question on matching rim - tire width

2019-03-10 Thread aeroperf

The best explanation I've seen on this is from Sheldon Brown.

https://www.sheldonbrown.com/tire-sizing.html

"If your tire is too narrow for the rim, there's an increased risk of 
tire/rim damage from road hazards. 

If its too wide for the rim, there's an increase risk of sidewall wear from 
brake shoes, and a greater risk of loss of control in the event of a sudden 
flat."

A little lower on the page he provides a "what fits what" chart, and 
states: "Note: This chart may err a bit on the side of caution. Many 
cyclists exceed the recommended widths with no problem"

I'm running Conti Speed Ride 42s on Atlas rims no problem.

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[RBW] Re: Question on matching rim - tire width

2019-03-10 Thread Mark Anderson
A wider-than-recomended tire is unlikely to blow off an undamaged rim due 
directly to the weight of the bike.  That's not really how clinchers work.

An important part of the upper limit on width from Velocity's perspective 
is that very wide tires run at high pressures can lead to rim failure, 
likely in the form of cracked webs and/or sidewalls.  If you are pumping up 
those 50 mm tires to 90 psi, then you're probably out of spec. for the 
Atlas rim.  You'd also be nuts to do so for any number of other reasons. 
 If you're using sane pressures for your weight (what, 25-35 psi? Less? I 
haven't weighed that little since I was ten...), 50s on Atlas and 45s on 
the A23 are probably fine structurally.  Just ride in the rain enough and 
you'll wear out the brake tracks before fatigue failure wrecks the rim 
anyway.

One reason to use a wider rim on your prospective AHH is that (many) 
caliper brake quick releases just open the brake a certain amount relative 
to the operational setting.  Thus, the wider the rim, the wider the 
inflated tire that can pass through the opened brakes.

-- 
Mark Anderson in Chicago

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[RBW] Re: Question on matching rim - tire width

2019-03-05 Thread Mark Schneider
I ride 42's (Compass) on A23's but 650B, Jan Heine states width isn't an 
issue for his tires. I ride Antelope Hills and Schwalbe G-One 50's with 
Dyads on my Atlantis but I purchased some Cliffhangers for the Atlantis so 
I can run other wide tires tubeless. I see no issues with the A 23's for a 
Homer, they're great rims.

Mark

On Monday, March 4, 2019 at 5:33:27 PM UTC-8, Ash wrote:
>
> Velocity has a 'optimal' tire width specified for their rims.
>
> A23:  23mm - 35mm
> Atlas: 28mm - 45mm
> Cliffhanger: 45mm - 65mm
> and so forth.
>
> What's the effect when the tire is in outside of that range?
>
> For instance, what type issues or degradation in riding experience might 
>  I face if I mount 47mm tire on A23s?
>
> I've been using 650bx50mm tires on Atlas without knowing that's not 
> recommended.  The ride has been fine.  Is there a risk?   My + cargo weight 
> has never exceeded 180lbs by the way.  Perhaps the tire might have popped 
> out of the rim if the weight were to be a lot more?  Is that the  concern?
>
> I'm interested in getting a pair A23s built for my future AHH.
> What's the widest tire you've been successfully using with A23s?
>

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[RBW] Re: Question on matching rim - tire width

2019-03-05 Thread Chris L
This is a major problem with 2" Maxxis Torch tires on my Dyad rims.  They 
are fine for normal, mostly straight, riding but the tires have a square 
profile, like a mountain bike, and in sharp turns, they are all kinds of 
squirrely.  If the weather wasn't so bad, I would have already retired them 
to backup status.  



On Tuesday, March 5, 2019 at 7:49:49 AM UTC-6, tc wrote:
>
>
>
> Wider tires on smaller rim widths will increase the roundness of the 
> tire’s profile, which is insignificant unless the tread pattern changes 
> markedly towards the outside of the tire. You may get a more abrupt change 
> in steering as you lean that tire over in sharp corners because the tread 
> is different. But not so on a consistent tread. 
>
>
>

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Re: [RBW] Re: Question on matching rim - tire width

2019-03-05 Thread esoterica etc

Anybody have experience with narrower tires on wide rims? I’ve got Velocity 
Cliffhangers which are optimally rated between 45-65mm, but I’d like to try 
running tires between 38-43mm on them. 

~Mark 


> On Mar 5, 2019, at 09:12, lconley  wrote:
> 
> I have Snoqualmie Pass 44mm on A23s on my Sam. No problems for 2-3 years. All 
> on pavement except some rough brick roads on the Cross Florida Ride - perfect 
> tires for brick roads.
> 
> Laing
> Cocoa FL
> 
>> On Monday, March 4, 2019 at 8:33:27 PM UTC-5, Ash wrote:
>> Velocity has a 'optimal' tire width specified for their rims.
>> 
>> A23:  23mm - 35mm
>> Atlas: 28mm - 45mm
>> Cliffhanger: 45mm - 65mm
>> and so forth.
>> 
>> What's the effect when the tire is in outside of that range?
>> 
>> For instance, what type issues or degradation in riding experience might  I 
>> face if I mount 47mm tire on A23s?
>> 
>> I've been using 650bx50mm tires on Atlas without knowing that's not 
>> recommended.  The ride has been fine.  Is there a risk?   My + cargo weight 
>> has never exceeded 180lbs by the way.  Perhaps the tire might have popped 
>> out of the rim if the weight were to be a lot more?  Is that the  concern?
>> 
>> I'm interested in getting a pair A23s built for my future AHH.
>> What's the widest tire you've been successfully using with A23s?
> 
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[RBW] Re: Question on matching rim - tire width

2019-03-05 Thread lconley
I have Snoqualmie Pass 44mm on A23s on my Sam. No problems for 2-3 years. 
All on pavement except some rough brick roads on the Cross Florida Ride - 
perfect tires for brick roads.

Laing
Cocoa FL

On Monday, March 4, 2019 at 8:33:27 PM UTC-5, Ash wrote:

> Velocity has a 'optimal' tire width specified for their rims.
>
> A23:  23mm - 35mm
> Atlas: 28mm - 45mm
> Cliffhanger: 45mm - 65mm
> and so forth.
>
> What's the effect when the tire is in outside of that range?
>
> For instance, what type issues or degradation in riding experience might 
>  I face if I mount 47mm tire on A23s?
>
> I've been using 650bx50mm tires on Atlas without knowing that's not 
> recommended.  The ride has been fine.  Is there a risk?   My + cargo weight 
> has never exceeded 180lbs by the way.  Perhaps the tire might have popped 
> out of the rim if the weight were to be a lot more?  Is that the  concern?
>
> I'm interested in getting a pair A23s built for my future AHH.
> What's the widest tire you've been successfully using with A23s?
>

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[RBW] Re: Question on matching rim - tire width

2019-03-05 Thread tc
Yeah, if you think about the physics of it, you can relate to holding a balloon 
only by the knot at the bottom and pushing it from side to side with the other 
handcompared to holding it with your whole hand over a much wider surface 
area. 

Smaller cross section of the holding area allows more wobble. 

The 42 Cazaderos I’ve mounted on my Dyads are only 2mm over Velocity’s 
recommended max, and I can assure you that’s insignificant, from a holding and 
performance perspective.

Wider tires on smaller rim widths will increase the roundness of the tire’s 
profile, which is insignificant unless the tread pattern changes markedly 
towards the outside of the tire. You may get a more abrupt change in steering 
as you lean that tire over in sharp corners because the tread is different. But 
not so on a consistent tread. 

Lastly, lower tire pressures will amplify the above. But again, only if you’re 
talking about tire widths way over the max recommended. 

Tom

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[RBW] Re: Question on matching rim - tire width

2019-03-05 Thread Chris L
I also have Dyads and my experience is that I much prefer the handling of 
the bike with 40'ish mm tires over 50-60mm tires.  I don't know how much of 
that is tire width, tire shape or quality of tire and how much of that is 
tire/rim width mismatch.  I just know that with 40mm tires, the handling is 
much, much more confidence inspiring.  

Based on my experience, I will us Velocity's ratings on any wheels I buy in 
the future.  



On Monday, March 4, 2019 at 9:37:40 PM UTC-6, tc wrote:
>
> Ash, 
> I have Dyads on my MIT AHH. It’s a nice, strong rim, and plenty wide to 
> accept the max rec. tire width (42) for the AHH. 
>
> If you have any concerns, talk to Rich! 
>
> Tom

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[RBW] Re: Question on matching rim - tire width

2019-03-04 Thread Nick Payne
Early MTBs used cut-down MA2 rims (13.5mm internal width) and ran 2" wide 
tyres on them without problems. My touring bike has been running 38mm wide 
tyres on MA2 rims for years - never had any problems with that - and at the 
other end of the scale, I have some DT Swiss XM401 rims (22.5mm internal 
width, according to DT intended for tyres up to 2.5" wide) on which I've 
been running Schwalbe G-One 30mm wide tyres without problem.

Nick

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