27,5 inch (650B) wheels on a 26inch frame?

[Agteros]

Mine is still intact

You train so much, you'll be able to do the 94.7 on a rigid 16" kiddies fixie

[Swift01]

16inch kiddies bike would be too big..... Josh finished the 94.7 on this bike. I think 4hrs something... does wheel size count????

[Agteros]

16inch kiddies bike would be too big..... Josh finished the 94.7 on this bike. I think 4hrs something... does wheel size count????

Hahah

Since he is the resident wheel size expert, how about it nsBB? a comparison of 12er/26er/650be'er/29er?

[NotSoBigBen]

Hahah

Since he is the resident wheel size expert, how about it nsBB? a comparison of 12er/26er/650be'er/29er?

 

You okes are not 'lekker in the head' as my old man used to say ....

[KaKa]

what about the gearing. on 29er the gearing must be changed to get the "advantage"

 

ie the 29er gearing is diffrent to a 26"

[jimmy hardtail]

A 29er wheel is about 12% bigger than a 26er. So your gearing needs to be about 12% lower. So just stay 1 cog higher at the back for the same speed. But I still think its nuts to spend R10000 on wheels that are 1,5 inches larger. 6% difference, how much difference will that really make? Maybe in your head, like when your new tires are so much faster than your old ones...

[Redlight]

Or you could just fit a cross mark 26 x 2.25 tire to your 26" rims. Same thing.

Same diameter. Same rolling circumference.

One would almost swear, some of you didn't do mathematics at school.

" a fool and it's money.....Arequipa soon parted "

[Redlight]

 

 

+1. Never heard that argument before...

On her knees holding her head in her hands, "why did I buy the piece of crap why"

[The_Break]

Just speak to a few people, but for your height I don't think 29er is good from what I have been researching. It seems 26er is perfect for you, whilst the 27.5 is suited for people around 172-178 in height.

[Hairy]

Or you could just fit a cross mark 26 x 2.25 tire to your 26" rims. Same thing.

Same diameter. Same rolling circumference.

One would almost swear, some of you didn't do mathematics at school.

" a fool and it's money.....Arequipa soon parted "

 

Or you could put a 2.25" decent tyre, not a cross mark on a 650B wheelset and then compare that to the 26'er wheelset.

 

When you did math at school they must have forgotten to teach to fairness when comparing two items, actually you sound like the guy who puts out and awards government tenders

 

I trust you can take the above as the jest it is intended to be.

[Apemanscolony]

The topic will never stop.

Ill recomend go to a few diffrent LBS an find out what they say. Each shop wanna sell something diffrent, and if more than 1 says the same then u know u on the right track.

U can get cheaper tyres than R1000, Buycycle sells and Chris Willemse if im not mistaken.

Im also going 27.5' wheels on my Scott Spark Carbon, but i need to change my fork, got a Rock Shox. Still however contenplating putting a Lefty or a Fox. 50/50 said both so im still in that dillemma.

Wait a few months, the prices of the wheels etc is gonna come down and there is shops etc who is going to run specials, im waiting till December then im getting mine

[GLuvsMtb]

I'm 6f1, and I find a 29 way too big for me. I'm in need of new wheels, so will hopefully get my 27.5 upgrade in september, and convert my Zula.

Let me know how that Zula conversion goes.

I'm a little reluctant to change geometry on my bike as it was designed for 26" wheels. I see guys slapping on 140mm forks onto bikes designed for 100mm forks and then they wonder why it handles like a truck.

[Geoff]

Have any of you gone and done some real calculations to compare the real world differences?

There is a big difference between the three options (26,27.5,29)...even when only considering the revolutions/km......then one has to consider the gearing influence and your own ability of producing enough power to be able to use whatever gearing you go for...efficiently!

 

I have a Scott Spark 40 with 26" wheels and a few changes made over the years to get it lighter....and according to my calculations....I am definitely gonna check if I can fit 27.5" rims with the same volume tyre as my current 26" tyres.

1.5inches makes a big difference if you know what to look for and how t use it

[kosmonooit]

A 29er wheel is about 12% bigger than a 26er. So your gearing needs to be about 12% lower. So just stay 1 cog higher at the back for the same speed. But I still think its nuts to spend R10000 on wheels that are 1,5 inches larger. 6% difference, how much difference will that really make? Maybe in your head, like when your new tires are so much faster than your old ones...

 

12% bigger in diameter? so how this translates to difference in gearing might not be the same number, we need a proof or ref please.

 

Maybe the difference to 650b is subjective, but seemed to make a difference for Nino this last XC season. Personally I think its also about rider geometry (29'er suits taller riders) and personal aesthetics.

[Ceres]

I say go for the 650b option, when I had 26inch wheels on my bike I could not stay with a 29er on a flat piece of road I then went for the 650b option and now I stick with that same guy on that same piece of road. (not saying I can pass him though)

[Vetseun]

I say go for the 650b option, when I had 26inch wheels on my bike I could not stay with a 29er on a flat piece of road I then went for the 650b option and now I stick with that same guy on that same piece of road. (not saying I can pass him though)