Tarheel Trailblazers Message Board - converting 29 to 650b?

02/28/21 at 11:49am

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converting 29 to 650b? (Read 978 times)

isitwinteryet Big Ring Offline in soviet russia, bike steal you! Posts: 1072 Joined: 06/18/09	converting 29 to 650b? 06/28/13 at 1:56am	Print Post
	i've been toying with this idea, to put a 650b tire on my 29er. it would take the extra agility that comes with the smaller wheel size would have to be a plus right? downfall is i'd loose some of the "rollover" characteristics of a bigger wheel surely clearance for the rims and tires around the frame/forks wouldnt be an issue. i guess theoretically the bb and cranks would sit almost an inch lower but its only an inch that wouldnt be so bad? i guess i'd have to change the gearing some but that seems easy enough has anybody else tried this? anything else i'm not thinking of?

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Screaming Knees Big Ring Offline Work Ride Tarheel Trailblazers Posts: 1647 Location: Fort Collins, CO Joined: 06/02/10	Re: converting 29 to 650b? Reply #1 - 06/28/13 at 4:57am	Print Post
	Do it. Frankenstein builds are great. Your bottom bracket will be lower, causing possible pedal strikes (which suck, BTW). Your gearing wouldn't change that much, just get a little easier. But that being said, you are still going to have a longer wheelbase which is what gives the 29er it's sluggish feel. Get someone to let you borrow a wheelset for a ride and tell us how it is.
	« Last Edit: 06/28/13 at 2:59pm by Screaming Knees »
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criticalmass Big Ring Offline Squirrels, the new TTF Posts: 2027 Joined: 07/24/06	Re: converting 29 to 650b? Reply #2 - 06/28/13 at 2:22pm	Print Post
	So if the bike drops the same distance in the front as it does in the back, will it steepen the head tube angle?

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Screaming Knees Big Ring Offline Work Ride Tarheel Trailblazers Posts: 1647 Location: Fort Collins, CO Joined: 06/02/10	Re: converting 29 to 650b? Reply #3 - 06/28/13 at 2:59pm	Print Post
	Good point. Editing original post...

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isitwinteryet Big Ring Offline in soviet russia, bike steal you! Posts: 1072 Joined: 06/18/09	Re: converting 29 to 650b? Reply #4 - 06/28/13 at 6:04pm	Print Post
	do you think theres a way to shorten the wheelbase up? custom spacers/dropouts for the rear? maybe some for the front too??

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Screaming Knees Big Ring Offline Work Ride Tarheel Trailblazers Posts: 1647 Location: Fort Collins, CO Joined: 06/02/10	Re: converting 29 to 650b? Reply #5 - 06/28/13 at 6:17pm	Print Post
	no.

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isitwinteryet Big Ring Offline in soviet russia, bike steal you! Posts: 1072 Joined: 06/18/09	Re: converting 29 to 650b? Reply #6 - 06/30/13 at 4:23am	Print Post
	i think its not a bad idea i have a few things in mind all i need is a good machine shop and i think im in business

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phattire Little Ring Offline Work Ride Tarheel Trailblazers Posts: 892 Location: Corncobb Joined: 07/06/11	Re: converting 29 to 650b? Reply #7 - 06/30/13 at 11:31pm	Print Post
	????? :exclamation

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The Cycle Path IB Room In The Loop Project Board Offline Treasurer '11 to '18. Trails Chair '12-'18. Posts: 11835 Location: Lake Norman Joined: 08/04/03	Re: converting 29 to 650b? Reply #8 - 07/03/13 at 1:05am	Print Post
	I'm not thinking it's such a great idea. The head and seat tube angles will stay the same and so will the wheel base. Same head tube angle with a smaller wheel should speed it up a bit but think having the same wheel base would negate any gains. And you would loose not only an inch of BB clearance but also bring the end of the crank arm 1 inch closer to the ground. You will probably pedal strike a lot. But like all things Frankenstein, give it a try and let us know how it works out!

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isitwinteryet Big Ring Offline in soviet russia, bike steal you! Posts: 1072 Joined: 06/18/09	Re: converting 29 to 650b? Reply #9 - 07/03/13 at 5:18pm	Print Post
	do you think if i went straight from 29 to 26 and skip the 650 it would get more benefits?

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Screaming Knees Big Ring Offline Work Ride Tarheel Trailblazers Posts: 1647 Location: Fort Collins, CO Joined: 06/02/10	Re: converting 29 to 650b? Reply #10 - 07/03/13 at 6:11pm	Print Post
	you should put a 26er on the front and a 29er on the rear.

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isitwinteryet Big Ring Offline in soviet russia, bike steal you! Posts: 1072 Joined: 06/18/09	Re: converting 29 to 650b? Reply #11 - 07/03/13 at 6:17pm	Print Post
	pretty sure that would affect headtube angle doe

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Screaming Knees Big Ring Offline Work Ride Tarheel Trailblazers Posts: 1647 Location: Fort Collins, CO Joined: 06/02/10	Re: converting 29 to 650b? Reply #12 - 07/03/13 at 8:30pm	Print Post
	Nah, it'll be ok

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twinsdad Ex Member	Re: converting 29 to 650b? Reply #13 - 07/04/13 at 2:19am	Print Post
	And think how fast it will accelerate with that 26er tire in the front...Don't even get me started on the awesome small bump compliance with the 29er out back....

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The Cycle Path IB Room In The Loop Project Board Offline Treasurer '11 to '18. Trails Chair '12-'18. Posts: 11835 Location: Lake Norman Joined: 08/04/03	Re: converting 29 to 650b? Reply #14 - 07/04/13 at 3:27am	Print Post
	Quote: And think how fast it will accelerate with that 26er tire in the front...Don't even get me started on the awesome small bump compliance with the 29er out back.... +1!

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deucedeuce Coaster Bike Offline Posts: 138 Joined: 01/24/13	Re: converting 29 to 650b? Reply #15 - 07/05/13 at 8:40pm	Print Post
	isitwinteryet wrote on 07/03/13 at 5:18pm: do you think if i went straight from 29 to 26 and skip the 650 it would get more benefits? YES

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isitwinteryet Big Ring Offline in soviet russia, bike steal you! Posts: 1072 Joined: 06/18/09	Re: converting 29 to 650b? Reply #16 - 07/06/13 at 5:55pm	Print Post
	Does anyone have a 26 I can throw on the front to test it out? Maybe 1 for the back too? I will need 1 w disc breaks fyi

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The Cycle Path IB Room In The Loop Project Board Offline Treasurer '11 to '18. Trails Chair '12-'18. Posts: 11835 Location: Lake Norman Joined: 08/04/03	Re: converting 29 to 650b? Reply #17 - 07/06/13 at 6:01pm	Print Post
	isitwinteryet wrote on 07/06/13 at 5:55pm: Does anyone have a 26 I can throw on the front to test it out? Maybe 1 for the back too? I will need 1 w disc breaks fyi Surely you're not serious? Dude. You'd pedal strike riding on the road.

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isitwinteryet Big Ring Offline in soviet russia, bike steal you! Posts: 1072 Joined: 06/18/09	Re: converting 29 to 650b? Reply #18 - 07/06/13 at 6:19pm	Print Post
	u think? should only drop me 1.5" right? im pretty sure i have at least that much clearance to deal with but ill double check next time im near the bike

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The Cycle Path IB Room In The Loop Project Board Offline Treasurer '11 to '18. Trails Chair '12-'18. Posts: 11835 Location: Lake Norman Joined: 08/04/03	Re: converting 29 to 650b? Reply #19 - 07/06/13 at 7:42pm	Print Post
	isitwinteryet wrote on 07/06/13 at 6:19pm: u think? should only drop me 1.5" right? im pretty sure i have at least that much clearance to deal with but ill double check next time im near the bike And the end of your crank arms will be 1.5 inches closer to the ground on the down stroke. I wouldn't turn and pedal at the same time!

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isitwinteryet Big Ring Offline in soviet russia, bike steal you! Posts: 1072 Joined: 06/18/09	Re: converting 29 to 650b? Reply #20 - 07/06/13 at 8:09pm	Print Post
	yeah i thnk ive got the clearance ill double check later doe

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JR Big Ring Offline Posts: 1040 Joined: 03/29/11	Re: converting 29 to 650b? Reply #21 - 07/06/13 at 8:59pm	Print Post
	Why stop at 26"? Go 24" wheels. Make that thing spritely...

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Natedilla Small Cog Offline Work Ride Tarheel Trailblazers Posts: 410 Joined: 12/16/11	Re: converting 29 to 650b? Reply #22 - 07/07/13 at 12:24am	Print Post
	Dude..Don't listen to all these skeptics. Go for it. And the 26/29" combo would be sick. Post pics

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The Cycle Path IB Room In The Loop Project Board Offline Treasurer '11 to '18. Trails Chair '12-'18. Posts: 11835 Location: Lake Norman Joined: 08/04/03	Re: converting 29 to 650b? Reply #23 - 07/07/13 at 2:30am	Print Post
	Remember going from a 29" wheel to a 26" wheel on a 29er frame will probably effectively steepen the head tube angle by probably 1-2 degrees. Like running old school XC bikes from the 80's with 22" wide bars...squirrelly!

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The Cycle Path IB Room In The Loop Project Board Offline Treasurer '11 to '18. Trails Chair '12-'18. Posts: 11835 Location: Lake Norman Joined: 08/04/03	Re: converting 29 to 650b? Reply #24 - 07/07/13 at 2:30am	Print Post
	JR wrote on 07/06/13 at 8:59pm: Why stop at 26"? Go 24" wheels. Make that thing spritely... Why not 20's?

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btalley Big Ring Offline aka "Lil Bill" or "Squatch" Posts: 1477 Location: Mooresville, NC Joined: 08/03/10	Re: converting 29 to 650b? Reply #25 - 07/07/13 at 3:25pm	Print Post
	24 rear 29 front. 49er As long as you can get you front wheel over something, the back will follow, no real need for a rear wheel at all. Not sure why I have one on my bike. It helps hold it on my bike rack or stand up in the garage. I am converting mine to one of those you can ride on top of water. Maybe even a mini hovercraft. Who rides their bike anyway? Don't we just argue about how much 29ers suck and how fast you can e-ride around sherrman ranch or fishers farms? FF in 17 minutes! Strava record holder in the rain! Didn't even shift, so I SSed the whole thing

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isitwinteryet Big Ring Offline in soviet russia, bike steal you! Posts: 1072 Joined: 06/18/09	Re: converting 29 to 650b? Reply #26 - 07/08/13 at 1:36pm	Print Post
	ehhh im not sure who to trust here anymore i think some of you are messing with me

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The Cycle Path IB Room In The Loop Project Board Offline Treasurer '11 to '18. Trails Chair '12-'18. Posts: 11835 Location: Lake Norman Joined: 08/04/03	Re: converting 29 to 650b? Reply #27 - 07/08/13 at 6:42pm	Print Post
	isitwinteryet wrote on 07/08/13 at 1:36pm: ehhh im not sure who to trust here anymore i think some of you are messing with me Ya think?

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