Contemporary wheel design

[Dieter ( ͡° ͜ʖ ͡°)]

if I could offer a bit of a summary, it would be that wider is better, up to a point. Also, wider rims need appropriately wider tyres.

 

If you have any doubts prior to purchase, and the internet offers too much fanboism, just ask the knowledgeable ppl, aka your rim manufacturer what width tyre they recommend.

Okay so the Mavic internal width (SLR) is 19mm and a Spank Oozy has 21mm. So I want to run 2.25 tyres then there shouldn't be a noticeable difference anyway? What internal width will it start to matter, maybe closer to 25mm? I know this matters very little in the grand scheme of things as tyre choice and pressure will matter a lot more but it's interesting. 

[Capricorn]

Okay so the Mavic internal width (SLR) is 19mm and a Spank Oozy has 21mm. So I want to run 2.25 tyres then there shouldn't be a noticeable difference anyway? What internal width will it start to matter, maybe closer to 25mm? I know this matters very little in the grand scheme of things as tyre choice and pressure will matter a lot more but it's interesting. 

 

I'd use that mavic table, purely as a guide to help direct my initial tire width choices. I'll still experiment to see what works and what doesn't work, and how it doesn't work. There's much subjectivity in that approach however.

[Captain Fastbastard Mayhem]

The M90 is the M90. If anyone bothered to check Enve's website, HV is reserved for sub-classification of M60 and M70 product lines.

 

worth noting something enve's research noted (which is inline with what Mavic says about appropriate tyre width

Sorry, yes. You're right

[popcorn_skollie]

MYTH #1 – RUNNING A WIDER RIM INCREASES EFFECTIVE TREAD.

from enve's journal

 

http://enve.com/wp-content/uploads/2015/08/chart-tire-highroller-geometry.png

As you can see – rim width does very little to affect tread width, assuming you are running an appropriately sized rim for your tire.  With the Maxxis High Roller II, a 2.3″ tire, there are infinitesimally small tread width gains (about 1/3 of a millimeter) from boosting internal rim width 10 mm from 25 mm to 35 mm.  For you guys doing the math at home, about the same size as 3 strands of hair. So, what are you getting? You are getting casing width and most likely added weight.

 

The thing is though, Bob fits some wider rims to his bike. same tyres as before. Bob reckons its the greatest thing since sliced cheese. He feels more confident in corners and off cambers. Bob is sold on wider rims. When Bob is asked why he thinks they are better. Bob reckons its because the wider rim allows for more of his tyres thread to come into contact with the terrain when he rides. I mean it makes sense right?

Then Enve comes along and runs some tests. No Bob, you're wrong... 

[Dieter ( ͡° ͜ʖ ͡°)]

MYTH #1 – RUNNING A WIDER RIM INCREASES EFFECTIVE TREAD.

from enve's journal

 

http://enve.com/wp-content/uploads/2015/08/chart-tire-highroller-geometry.png

As you can see – rim width does very little to affect tread width, assuming you are running an appropriately sized rim for your tire.  With the Maxxis High Roller II, a 2.3″ tire, there are infinitesimally small tread width gains (about 1/3 of a millimeter) from boosting internal rim width 10 mm from 25 mm to 35 mm.  For you guys doing the math at home, about the same size as 3 strands of hair. So, what are you getting? You are getting casing width and most likely added weight.

 

The thing is though, Bob fits some wider rims to his bike. same tyres as before. Bob reckons its the greatest thing since sliced cheese. He feels more confident in corners and off cambers. Bob is sold on wider rims. When Bob is asked why he thinks they are better. Bob reckons its because the wider rim allows for more of his tyres thread to come into contact with the terrain when he rides. I mean it makes sense right?

Then Enve comes along and runs some tests. No Bob, you're wrong... 

http://reviews.mtbr.com/wp-content/uploads/2015/04/wide-rim-drawing.jpg

 

The thing about wide rims would be lowers pressure which affects almost everything. I don't think you can compare DH guys because they can't go very low in pressure? I'm still very undecided! 

[Dieter ( ͡° ͜ʖ ͡°)]

http://reviews.mtbr.com/wp-content/uploads/2015/04/wide-rim-drawing.jpg

 

The thing about wide rims would be lowers pressure which affects almost everything. I don't think you can compare DH guys because they can't go very low in pressure? I'm still very undecided! 

After reading this I think my mind is made up now! Wider is better. MATHS

 

http://www.pinkbike.com/news/Tech-Tuesday--Wider-Rims-Are-Better-and-Why-Tubeless-Tires-Burp-.html

 

"The difference of three to five millimeters in rim width only amounts to about an 18-percent change in the moment arm (leverage) of a 2.4-inch tire acting between the rim flanges."

[JXV]

MYTH #1 – RUNNING A WIDER RIM INCREASES EFFECTIVE TREAD.

from enve's journal

 

http://enve.com/wp-content/uploads/2015/08/chart-tire-highroller-geometry.png

As you can see – rim width does very little to affect tread width, assuming you are running an appropriately sized rim for your tire. With the Maxxis High Roller II, a 2.3″ tire, there are infinitesimally small tread width gains (about 1/3 of a millimeter) from boosting internal rim width 10 mm from 25 mm to 35 mm. For you guys doing the math at home, about the same size as 3 strands of hair. So, what are you getting? You are getting casing width and most likely added weight.

 

The thing is though, Bob fits some wider rims to his bike. same tyres as before. Bob reckons its the greatest thing since sliced cheese. He feels more confident in corners and off cambers. Bob is sold on wider rims. When Bob is asked why he thinks they are better. Bob reckons its because the wider rim allows for more of his tyres thread to come into contact with the terrain when he rides. I mean it makes sense right?

Then Enve comes along and runs some tests. No Bob, you're wrong...

Your graph does not show the whole picture of what happens to a tyre on a wider rim... and you knew someone would challenge this so here goes [emoji12]

 

1) At the same inflation pressure on a wider rim the tyre casing will deflect less to the side when subjected to cornering forces - it will make the tyre feel more responsive to steering inputs, provided it retains traction. i.e. the bike feels like it goes more precisely where you point it.

 

2) By slightly reducing pressure within reason the rider can retain the same cornering feel as before but gains more traction due to a larger contact patch. Each tread block puts slightly less pressure on the soil but there are more of them in contact, so the soil under your tyre will sustain a higher cornering speed before it gives way.

 

Somewhere between points 1 and 2 a little more performance and ride comfort can be obtained. Obviously if you go too wide on the rim the tyre will not take its intended shape , too low on the pressure it will fold under cornering etc....

 

 

If the argument that wider rims make no real difference holds, then you must concede that narrower rims also make no difference and why don't we ride on 10mm wide rims 'cos they could be somewhat lighter.

 

 

Sent from my SM-G900F using Tapatalk

[popcorn_skollie]

If the argument that wider rims make no real difference holds, then you must concede that narrower rims also make no difference and why don't we ride on 10mm wide rims 'cos they could be somewhat lighter.

 

Bob's anecdotal evidence vs Enve's graph. It was tongue in cheek. 

You're preaching to the choir buddy. I love wide rims. Well...not too wide

[Captain Fastbastard Mayhem]

Well, I've just received a set of 26" 34mm wide rims - sunringle S Types, to be exact. I have at home a set of Small Block 2.1's and a Racing Ralph 2.1 as well. Will be interesting to see how they fit! 

 

Just need to build them up on to my hubs before I fit them. They'll go on either my wife's bike or my XCAMHTDJ bike. 

[raptor-22]

Rim width is another those farcical trends sold by the bike industry. An AM tyre does well with a wider rim since it is already a wider tyre. For xc the SLR is plenty wide enough. I would not hesitate to purchase a pair or build a wheel around American Classic disc 101

[popcorn_skollie]

XCAMHTDJ bike.