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I know some fat / chubby kinds do, but i was thinking bikes like Whyte T130/150, maybe a 30mm internal front, 25mm rear?
Would it make sense or just gibberish twaddle?
Shhhhhhh, don’t let the industry hear you suggest this.
😛
So that they can sell wider rimmed wheels to the [s]gullible[/s] enthusiasts.
That is new 'double boost' which is coming in 2019 model year.
Makes sense in theory, I used to run an i23 rear rim and an i25 front but when the rear broke I swapped it to an i25 as no real downside. I could go wider on the front again I guess.
Mavic do some wheelsets like this now I believe.
If getting a custom wheelset I'd consider something like ex471 rear and xm481 front.
Mavic do some wheelsets like this now I believe.
Indeed they do. Deemax, or at least some variants of Deemax.
No-one uses the same width wheels front and rear
Mavic did the crossmax enduro, the stupidest wheelset in the world- it was the front rim off an SX wheelset and the back rim off an ST, so it wasn't just narrower at the back, it was also less strong. HAnds up everyone who wants a weaker back wheel than the front
I have pretty much the same width tyres on front and back, wouldn't want to have mismatched rims tbh
No-one uses the same width wheels front and rear
..that was also not the OP's questions.. 🙄
The question was, why don't bikes come specced with a wider front rim..
For what it's worth, most bikes are certainly coming specd with larger rims now than they did before. I guess the majority wouldn't even know the difference if you added 2-3mm to the rim at the front.
Also, there is a practical limit to rim width and it's effect on Tyre profile in my experience. Some wide rim/tyre combos create horrible profiles that don't feel right (too square?).
No-one uses the same width wheels front and rear
Que?
I have pretty much the same width tyres on front and back, wouldn't want to have mismatched rims tbh
Still a case for a stronger rear rim, if not narrower. However I typically ride with 2.25in rear and 2.35in front (29in).
Surely you want a wider rim at the back?
At the front you want a more rounded tyre profile for cornering grip, so a narrower rim helps with that. At the rear an wider rim will create a flatter tyre profile better suited to traction.
Plus, traditionally a wider rim tends to be a stronger rim.
The wider rim is really a trend that has only come around in the last... 2 or so years? Before then an EN521 was considered a normal rim.
I guess manufactures can't keep up - we're only just seeing the big boys really push longer and slacker yet that trend feels like it's as old as 650b.
No-one uses the same width wheels front and rear
Jones?
HAnds up everyone who wants a weaker back wheel than the front
Northwind that's brilliant - my fave comment of the day.
bigyinn - Member
Surely you want a wider rim at the back?
At the front you want a more rounded tyre profile for cornering grip, so a narrower rim helps with that. At the rear an wider rim will create a flatter tyre profile better suited to traction.
Plus, traditionally a wider rim tends to be a stronger rim.
Apparently narrower rim is better for rolling resistance, wider for responsiveness.
What would that do for lateral stiffness and vertical compliance?
My Whyte T130RS 2017 ..came with 29mm internal rims as standard ..I think I can live without the extra 1mm..but the missus could disagree ..
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[url= https://www.flickr.com/photos/156204930@N03/37724585144/ ]Screenshot_20171115-164306[/url] by [url= https://www.flickr.com/photos/156204930@N03/ ]Neil Hodgson[/url] - [url= https://play.google.com/store/apps/details?id=com.dariogf.flickr2BBcode_lite ]Flickr2BBcode LITE[/url]
Northwind - Member
Hands up everyone who wants a weaker back wheel than the frontI have pretty much the same width tyres on front and back, wouldn't want to have mismatched rims tbh
My "DH" wheelset is a Hope DH rear rim and a Hope 35mm front - 2.5 Maxxis DD front, 2.3 DD rear. Mismatched for the exact opposite reason - want a toughrer tum out back
want a toughrer tum out back
Is that for all your casing? 😛
maybe a 30mm internal front, 25mm rear?
That's what I use.
At the front you want a more rounded tyre profile for cornering grip, so a narrower rim helps with that.
Use a tyre designed for a wider rim, to avoid too square a profile.
Plus, traditionally a wider rim tends to be a stronger rim.
I'm glad you said traditionally… there are now plenty of lighter wide rims ideal for front use, and plenty of less wide rims with added strength but not added weight… ideal for the rear.
Why don't bikes come specced with a wider front rim?
The market for new bikes is already insanely confused by all the wheel/rim/tyre sizes… mismatched ones would confuse things even more.
If you know exactly what you want, build your bike up from a frame.
Hodgynd- your bluetooth is on. HTH.
Been very interesting reading the tech talks from the EWS over the last couple of years. Seems like super wide rims and all that twaddle is the preserve of the weekend warriors 😉 Most seem to be on fairly regular 25-30mm rims same front and back. If that is the type of riding your aspiring to then maybe it's the right kit for the job or you can aim for a ((0.58^3/WW)*P)/TW increase in grip...
Back in the mists of time, I used to run a Doublewide rim on my dh bike.
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Doesn't actually seem that wide now by modern standards.
Anyway, it was rubbish. Wrapped it around a tree at Hopton.
True story.
I have the deemax enduros which are 28 internal front and 25 rear, not sure I notice any benefit but the back is not silly flex like the yellow ones they did.
The market for new bikes is already insanely confused by all the wheel/rim/tyre sizes… mismatched ones would confuse things even more.
Without any insider industry info, I'd assume it's also because many bike brands buy their wheels in ready-made, selecting from a suppliers' list of products. Which is unlikely to offer different front/rear rims.
Anyway, I still think it's s smart idea and could see it becoming more of a "thing" in future.
cokie - MemberIs that for all your casing?
100% 🙂
How about wheel diameter as well as width?
#nothingnew
#thatbrowntrek
Good idea MOAA - we could call it a 69er = 29mm internal front & 26mm internal rear 💡
mikewsmith - MemberBeen very interesting reading the tech talks from the EWS over the last couple of years. Seems like super wide rims and all that twaddle is the preserve of the weekend warriors Most seem to be on fairly regular 25-30mm rims same front and back
TBH I like a big ****-off tyre with a big footprint and a lot of volume and I figure the manufacturers mostly know what shape the tyre should be better than I do... other'n thatI couldn't really give a rat's ass what Sam Hill likes... it's like worrying about what tyre pressures Lewis Hamilton uses
reading maxxis blurb on their new "wide" tyres they say there for a more rounded profile when running wide rims . Are they trying to sort out the problems when running wide rims .
Just run narrower ones !!!
Bikes come spec'd for Mr Average. finding ANY bike that's spec'd exactly how you'd want it is nigh on impossible unless you go custom build.
No it isn't Northwind. you probably wouldn't have ever ridden a DHF if it wasn't for the likes of Sam Hill.it's like worrying about what tyre pressures Lewis Hamilton uses
Talking of Sam. he's pretty much singlwhandedly proven all the new new shit (wheel/tyre sizes, new geometry, XXL bikes for shortarses etc. etc). most #enduro wannabe mtbers crave to make them faster really isn't.
and as for tyre pressures. Hill will be most likely be running higher pressures than you. As going fast requires it.
Given the things the guy can do on a bike, what makes Sam Hill faster down a trail is likely to have bugger all relation to what will make me faster. If I was minded to go any faster, that is.
never used a soft compound tyre Greyspoke?
in here. That surprises me.
gwurk - MemberNo it isn't Northwind. you probably wouldn't have ever ridden a DHF if it wasn't for the likes of Sam Hill.
No doubt, but so what? There's a difference between doing things because racers do it, and racers' input influencing the kit that's out there.
And as for the rest, he's on a 650b modern geometry Mega C isn't he?
he's on a 650b modern geometry Mega C isn't he?
That's what they want you to think.
It's really a 2007 Iron Horse Sunday with Nukeproof stickers.
gwurk>>>
never used a soft compound tyre Greyspoke?
in here. That surprises me.
I was using super-tackys (and indeed, I think, Minion DHFs) before I ever heard of Sam Hill. Once I heard of him and saw the video, I started trying to ride my bike round corners like him. This was not an unalloyed success.
I haven't seen him ride one of these new-fangled enduro races. Does he do it differently now?
I suppose it does depend on where you put your baseline for performance improvements though.
So it isn't like worrying about Hamilton's tyre pressures in your Mondeo.No doubt, but so what?
It's like choosing a RACE tyre to help you mince about on in slightly more control. Because that's exactly what you are doing.
Not as "modern geometry" as his 2005 bike was.And as for the rest, he's on a 650b modern geometry Mega C isn't he?