I'm wondering about the feasiblity of replacing my sus forks and 26" wheel with rigid forks and a 29" wheel, for the winter.
I'm trying to figure out what A2C I'd need.
Presently ruinning Magura Thors, which have A2C of 530mm.
Say I'm running them at 30% (of 150mm) sag, thats 485mm.
Now, I guess a 29" wheel will add 1.5" (38.1mm) to the front axle height (assuming same width tyres are used)
So does that mean I need a fork with around 450mm A2C to get the same ride height and head angle?
And can you get a 29" fork with 450mm A2C?
[i]Personally[/i]I would go as short as I could.
I'm currently using a 100mm spaced Pugsly fork (447mm AtoC) and an On One Carbon Monocoque fork (450 AtoC) with 29er wheels - oodles of clearance.
Is this for your Djab? On mine I used a Salsa Cromoto (445mm AtoC) again plenty of room for a 29er wheel and tyre but felt it tipped the geometry back too far.
Yes, for the D-Jab.
Voodoo Zombie fork looks good (and cheap on US ebay) but only seems to be 470mm, which would be fine if I stuck with 26" front wheel.
Yours always looked scary steep to me!
Just noticed X-Lite carbon fork in 15mm bolt-thru is available in 455 flavour. Maybe with a 650b wheel...
According to Mattchester, 430mm is limit for 29" wheel with a 2.1" tyre, so I should be fine.
Bloody 69er riders!
I ran a 425mm AtoC Salsa fork with a 2.25'' 29er Ardent - No issues there either 😉
I've used the carbon on one fork worked a treat. That reminds me I need to sell it.
I need to sell it
email me....
Have hemailed
Isn't a penny farthing a 69er?
Isn't a penny farthing a 69er?
Same principle, but proportions are slightly different. 🙂
I got a 29er wheel in the 420mm A-C fork on my Inbred. It's fab.
And can you get a 29" fork with 450mm A2C?
If you're running a disk wheel, there's no such thing as a 26er fork or a 29er fork, just forks with different A-C lengths.
Just sent it again, put wrong address in 😕
Singular Hummingbird 26er / 69er was designed to be run with 120mm sus fork and 26" wheel or Hummingbird rigid fork, (450mm A2C with 55mm offset) and 29er wheel. I think the same fork is now used in the Singular Gryphon.
I've decided to go 26" wheels across 3 bikes, so I can chop and change between road, off road and winter tyres easily across 3 bikes, so I'm about to sell mine along with a Hope / Mavic 719 29er wheel. (email in profile if you're interested)
lipseal and andyh2: ygm
Sam @ Singular will sell you a Hummingbird fork for £70 IIRC which is designed for exactly this.
I'm running an the On One 26" carbon fork with a 29" front wheel in a to frame that's basically a copy of a Marin Rocky Ridge, works really well, steers nicely, enough tyre clearance for a 2.4 Ardent and I wouldn't want the front end any taller. As it is I'm running flat bars and a flipped stem to keep the front end manageable on climbs.
All works well. Just need a 650b in the back and it'll be a rigid, singlespeed, 650niner with an external eccentric bottom bracket. Lots of pointless niche ticks in one bike... 😉
I run a Hummingbird with 120mm Menjas or the 69er fork.
If you have a geometry set for your DJab, compare it with the Hummingbird geometry to see what the variance is. I find the 69er fork pretty amazing, although it does sometimes flop a little if I'm going too slow. This, by the way, is a good signal to ride faster.
I've been trying a 29" wheel in the front of my rigid bike recently that has 440mm RC31 forks. It generally worked well and was definitely more comfortable over the summer to the point where I felt it would have gone nicely with a short travel thudbuster. I've gone back to my 26" wheel for the winter as it has a hub dynamo.I think I prefer the handling in the wet and mud with the 26" wheel, it seems easier to control when it's sliding around. I had the 29" as low as possible with a flat bar and flipped stem and I'm now running the 26" the same.
I had thought I'd get the 29" rim rebuilt with the dynamo hub but now I think I'll keep both as they are and swap them out summer to winter.