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Old 02-08-2011, 05:22 AM   #18916
2whl-hoop
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Just out of curiosity, why wouldn't you be able to run 26 inch wheels in a 29 inch frame if both sets of wheels ran disc brakes? It'd be nice to have spare set of wheels, without knobs on them, to throw on when I want to ride bike paths with the wife and kids.
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Old 02-08-2011, 05:52 AM   #18917
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Quote:
Originally Posted by mtndragon View Post
I too have a 15 year old Cannodale with a headshock that is blown. I looked into rebuilding the fork last summer as I have an emotional attachment to the bike, but it was going to be like $700 to get the fork running again. That is just too close to a decent bike these days, and the advancement in brakes, shifters, etc is just to great to make it worthwhile. So mine is hanging from the ceiling in the garage. So much potential.

You'll be happy with a new 29er...
$700 sounds like the price for a complete replacement/w labor! Give this guy a shout:

http://www.mendoncyclesmith.com/

He's a Lefty/Headshock specialist, does excellent work for realistic prices.
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Old 02-08-2011, 05:54 AM   #18918
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Quote:
Originally Posted by mtndragon View Post
I too have a 15 year old Cannodale with a headshock that is blown. I looked into rebuilding the fork last summer as I have an emotional attachment to the bike, but it was going to be like $700 to get the fork running again. That is just too close to a decent bike these days, and the advancement in brakes, shifters, etc is just to great to make it worthwhile. So mine is hanging from the ceiling in the garage. So much potential.

You'll be happy with a new 29er...

I had a cannondale with a headshock and the thing went thru 3 seals the first year I had it, never even took it off road!!!! One seal blew just sitting in my apartment over winter time. I got rid of that bike...
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Old 02-08-2011, 05:59 AM   #18919
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Quote:
Originally Posted by s3hoop View Post
Just out of curiosity, why wouldn't you be able to run 26 inch wheels in a 29 inch frame if both sets of wheels ran disc brakes? It'd be nice to have spare set of wheels, without knobs on them, to throw on when I want to ride bike paths with the wife and kids.
Yes, you could put 26er wheels into a 29er frame with disc brakes. They would fit and the brakes would work.

However. As their names imply, they are respectively 26" and 29" diameter (approx) with knobbies. This means that running 26er knobbies on a 29er frame will put your cranks 1 1/2" closer to the ground. Can you spare this distance?

And. You want to run 29er knobbies and 26er skinnies? Loose another 1/2" or so.
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Old 02-08-2011, 06:04 AM   #18920
trailer Rails
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Quote:
Originally Posted by Wadester View Post
Yes, you could put 26er wheels into a 29er frame with disc brakes. They would fit and the brakes would work.

However. As their names imply, they are respectively 26" and 29" diameter (approx) with knobbies. This means that running 26er knobbies on a 29er frame will put your cranks 1 1/2" closer to the ground. Can you spare this distance?

And. You want to run 29er knobbies and 26er skinnies? Loose another 1/2" or so.
Basically what he is saying, you will smack your pedals off of everything, even if you are riding on the street. If you only rode in a straight line, it might work but you would have to be very careful, even on the slightest of turns.
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Old 02-08-2011, 06:12 AM   #18921
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Quote:
Originally Posted by s3hoop View Post
Should I either
1) convert it to a conventional suspension fork
2) have the headshock rebuilt, or
3) write it off due to the frame damage and keep the usable parts?

I've been thinking of getting a hardtail 29er, would 26 inch disc wheels work in a 29 inch frame if I kept the wheels off the f600 and ran street tires on them?

If you want to keep the bike, you can buy headtube reducers for about $30 to convert it to a standard 1 1/8" headtube. Then you can run any fork you want. You will need a new stem and headset as well. This probaly would be the least expensive option. Do not get it rebuilt unless you can get it done for cheep because it will blow out again. Contrary to what Pierce said, the head tube is the only non-standard part on those bikes, so once you have that converted you are good to go.
With all that in mind, 29ers are sweet, I would suggest buying a complete bike rather than swapping all the usable parts. It would not be that much more expensive and everything would be new and designed to work together.
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Old 02-08-2011, 10:00 AM   #18922
pierce
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Quote:
Originally Posted by Wadester View Post
Yes, you could put 26er wheels into a 29er frame with disc brakes. They would fit and the brakes would work.

However. As their names imply, they are respectively 26" and 29" diameter (approx) with knobbies. This means that running 26er knobbies on a 29er frame will put your cranks 1 1/2" closer to the ground. Can you spare this distance?

And. You want to run 29er knobbies and 26er skinnies? Loose another 1/2" or so.

they aren't actually 26 or 29". "26 inch" wheels are 559 millimeters at the rim bead (about the inner diameter of the tires), while "29 inch" are 622mm. 559mm is about 22", while 622 is about 24.5". this is the rim diameter, so the radius is going to be half of that, 11 vs 12.25", but of course, tire sizes toss all kinda variables into the picture.
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Old 02-08-2011, 10:12 AM   #18923
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Quote:
Originally Posted by Wadester View Post
$700 sounds like the price for a complete replacement/w labor! Give this guy a shout:

http://www.mendoncyclesmith.com/

He's a Lefty/Headshock specialist, does excellent work for realistic prices.
Thanks, I will check him out. I was told by Cannondale that because the fork is so old (Fatty 70) I would have to get a whole new fork set up to get a new cartridge. Thier stuff lacks compatibility with the rest of the market, so I've learned it really is a pain in the long term.
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Old 02-08-2011, 10:18 AM   #18924
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Quote:
Originally Posted by trailer Rails View Post
If you want to keep the bike, you can buy headtube reducers for about $30 to convert it to a standard 1 1/8" headtube.
Have you done this, or do you know first hand of anyone that has? I am curious to know the viability and functionality of this fix. Does it ride well and last? This would be a very appealing solution and it looks like the reducers are readily available.
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Old 02-08-2011, 11:27 AM   #18925
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Math warning.

Quote:
Originally Posted by pierce View Post

they aren't actually 26 or 29". "26 inch" wheels are 559 millimeters at the rim bead (about the inner diameter of the tires), while "29 inch" are 622mm. 559mm is about 22", while 622 is about 24.5". this is the rim diameter, so the radius is going to be half of that, 11 vs 12.25", but of course, tire sizes toss all kinda variables into the picture.
This is why I mentioned knobbies - 26x1.95-2.35 is their range for 26ers, and Cateye cal numbers (tread circumference in cm) range from 205-208. Circumference is Pi*Dia, so 205cm is 25.7" diameter, and 208 is 26.1". For 29ers, it's 229-233, or 28.7" - 29.2". Pretty good approximation.

26er slicks (26x1-1.5) are 191-201, or diameters of 24.9-25.2". Sure enuf - lose another 1/2". And I just winged that one.

Motorcycle wheel/tire systems are listed by their bead seat diameter, so you've got to look at the specific tire to know how tall they are too. This info is not as available, but important when doing something like Motard-ing a dirt bike and getting the gearing adjusted to be the same.
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Old 02-08-2011, 11:31 AM   #18926
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Quote:
Originally Posted by mtndragon View Post
Have you done this, or do you know first hand of anyone that has? I am curious to know the viability and functionality of this fix. Does it ride well and last? This would be a very appealing solution and it looks like the reducers are readily available.
Just google "headtube reducers" - lots of mfg and many sizes. They work fine if installed properly, just like a headset.
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Old 02-08-2011, 02:23 PM   #18927
2whl-hoop
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Quote:
Originally Posted by trailer Rails View Post
Basically what he is saying, you will smack your pedals off of everything, even if you are riding on the street. If you only rode in a straight line, it might work but you would have to be very careful, even on the slightest of turns.
Ok, I hadn't thought about that aspect. I just looked some pictures of 29ers and it does look like the chainstays angle down towards the bottom bracket.
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Old 02-08-2011, 02:27 PM   #18928
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Quote:
Originally Posted by pierce View Post
yeah. 3. and CL. cannondales are full of nonstandard bits that are incompatible with anything else. starting with those forks you got.
not that year. Only other thing non-standard is the stem.

AFA the question: nope. While you *could* put Bad Boy wheels and tires on it (assuming yer running discs) going the other way is no bueno.

If yer DIYing it, Price Point's house brand is very nice bike for the bux

M
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Old 02-08-2011, 02:29 PM   #18929
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Quote:
Originally Posted by pierce View Post

they aren't actually 26 or 29". "26 inch" wheels are 559 millimeters at the rim bead (about the inner diameter of the tires), while "29 inch" are 622mm. 559mm is about 22", while 622 is about 24.5". this is the rim diameter, so the radius is going to be half of that, 11 vs 12.25", but of course, tire sizes toss all kinda variables into the picture.
Yer overthinking this. 26" is based on the old Schwinn sizing and 29er because well... its bigger'n 26!

...and 700c is already taken.

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Old 02-08-2011, 04:19 PM   #18930
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I test rode a Cannondale Flash 29 with a lefty today, fucking sick.
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