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Old 2016-04-21, 05:51 PM   #1
danger_uni
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KH27.5 for 2016

Hey everyone,

The new KH27.5 unicycle is out. There's a blog post here, with some photos and a cool new video by Ryan Kremsater.
https://krisholm.com/en/blog/Introducing-the-KH-27.5

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Old 2016-04-21, 06:22 PM   #2
kahunacohen
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Hi Kris. Thanks for this. I've been eyeing the new KH26 for a while and when I found out this was coming out was thinking about getting this instead.

I know you're going to get a lot of questions about this vs the 26 but it's a lot of money to spend and no way to try it out first

I've ridden a 24 and 29 for muni and for short, fun urban commutes, rolling hops over curbs that kind of stuff. Most of the muni I do isn't super technical, but not pure cross country either. I like to climb etc. and sometimes like to get a bit technical. I found the 29 too big for what I like to do, and the 24 a bit too small, even with 137mm cranks.

I'm leaning toward the 27.5, but I noticed you said that a smaller person might like the 26 geo better. Do you have a suggestion for my body type and riding preferences?

Also, worst case, I guess, is that a 26 wheel would fit in this frame, so I could always get another wheel or sell the 27.5 if I don't like it...
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Last edited by kahunacohen; 2016-04-21 at 06:22 PM.
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Old 2016-04-21, 06:28 PM   #3
danger_uni
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It's a tough question because it depends a lot on riding style. My sense is that riders at 5'9" or smaller might still like the KH26 or smaller geometry (general rule, sure to be broken). I am 5'11 and the KH27.5 feels pretty ideal for me personally. On technical rides I find the KH29 a bit big and prefer it on more XC-oriented trails.

On the dealer side of things I did get questions about whether I was going to discontinue the KH26 in the same way that the 26" geometry has died out on mountain bikes. The only way I could see that happening is if the demand dropped too much. For reasons of fit, I think it is really important to have both in the lineup. The most important thing is to make sure it fits.

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Old 2016-04-21, 06:44 PM   #4
kahunacohen
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I'd be interested in others' opinions who are about the same size as I am and same riding style and who have actively ridden both sizes. Somewhat of a duplicate as the other conversation on this forum...but what the heck..
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Old 2016-04-21, 07:01 PM   #5
davidp
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Quote:
Originally Posted by kahunacohen View Post
I'm leaning toward the 27.5, but I noticed you said that a smaller person might like the 26 geo better. Do you have a suggestion for my body type and riding preferences?
The diameter of a 27.5x3 measures within an inch of a 29x2.2. If the 29 was too big for your preferred riding then it's hard to imagine that this won't be. It's basically a puffier tire in a 29" format (i.e. without going to 29+). That alone can make it more stable and forgiving on techy stuff but a 26x3 would be even more so.

My feeling is that if a 24 is too slow and a 29 too big you want a 26, not a 27.5. A 27.5 fits when you like the size of a 29 but want it to feel a bit more capable in the rough.

Quote:
Also, worst case, I guess, is that a 26 wheel would fit in this frame, so I could always get another wheel or sell the 27.5 if I don't like it...
Yes and given the clearance on that 27.5x3 tire a 29x2.2 will fit too.

Last edited by davidp; 2016-04-21 at 07:02 PM.
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Old 2016-04-21, 07:12 PM   #6
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I've been wanting a 27.5+ uni, using something like the Trax Fatty 27.5 3.25" tire, but it looks like that tire would be a really tight fit here.

This post shows the width of the Trax tire as 86mm, +-1 on a 60mm (inner diameter) rim. The KH site shows the clearance as 94mm, and the rim diameter 47.5mm (outer diameter, I guess).

So only 3-4mm clearance on each side with the 60 mm rim, maybe a little more with a narrower rim... maybe enough? Maybe not? I wish it weren't so close.
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Old 2016-04-21, 07:20 PM   #7
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A 60mm rim is signifcantly wider than a 47mm rim. In the linked thread the VTF 3.25 fit in a 29" Oracle frame on a 45mm wide Velocity Dually rim. I don't think it'll be a problem fitting in the KH27.5 on a 47mm rim.
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Old 2016-04-21, 07:43 PM   #8
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The uni in that thread was actually a steel Nimbus frame, strategically dented to make extra clearance. It wouldn't have fit otherwise. From the photo it looks like the actual mounted tire came in at 84mm, so just a mm or so more clearance than the tire spec gave.
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Old 2016-04-21, 08:00 PM   #9
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Quote:
Originally Posted by MrImpossible View Post
The uni in that thread was actually a steel Nimbus frame, strategically dented to make extra clearance. It wouldn't have fit otherwise. From the photo it looks like the actual mounted tire came in at 84mm, so just a mm or so more clearance than the tire spec gave.
Yes you're right about the frame not being an Oracle. Though he measured the width at 2.9" (74mm) and the mounted tire fit in his 32" frame, which is an extended Nimbus muni frame.

Hard to say it will definitely fit, but based on what I've seen I'd go for it myself.

Last edited by davidp; 2016-04-21 at 08:08 PM.
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Old 2016-04-21, 08:35 PM   #10
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The Knard and Havok have a measured width of 79 mm.

The 94 mm clearance was designed to fit up to a measured width of 83 mm, which is the width of the Duro Crux 27.5x3.25" tire. 86 should fit just barely, but it would be good to keep your wheel true =)

This was fine-tuning to make sure that it fit a reasonable range while keeping the fork blades as slim as possible.

As a side note - I have heard reports that the Trax Fatty 3.25" has some issues with self-steering. That is not a first-hand impression; I haven't ridden on it.

I am currently riding on a Trax Fatty 3.0" tire. It's pretty good although I like the Havok better. Very occasionally I find it tracks strangely, perhaps due to the concentration of tread along the ridgeline. Not enough to entirely dislike the tire. Measured width is smaller than the Knard or Havok - I think it should fit in a 2014 or earlier KH frame which would be a big plus for riders with that setup.

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Old 2016-04-21, 08:41 PM   #11
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Thanks, Kris!
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Old 2016-04-21, 09:04 PM   #12
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I love seeing the 27.5 size added to the uni world, for comparison sake can we know the outside diameter of the Kenda Havoc mounted up to the KH27.5 rim?
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Old 2016-04-22, 06:31 AM   #13
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Thumbs up

Not exactly the measurement of a Kenda Havok on a KH 27.5 but still a good image I wanted to share on this topic

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Old 2016-04-22, 06:52 AM   #14
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Quote:
Originally Posted by Siddhartha Valmont View Post
Not exactly the measurement of a Kenda Havok on a KH 27.5 but still a good image I wanted to share on this topic


Thanks sidd for this pic!
So finally I can definitely consider my g26+ (knard 26x3) as a g27.5 (when inflated enough)
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Old 2016-04-22, 11:07 AM   #15
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Kris, any plan to sell 27.5 frame separately?
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