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Old 2013-08-05, 12:36 PM   #1
UnicycleSam123
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Impact Gravity or KH trials unicycle?

Hi i am looking to get a good trials unicycle at a budget of £400 the two that look best are the Impact gravity and the KH trials at the moment i am leaning towards the impact but have no idea if it is any good as i have never read a review of it. also the impact comes with choice of cranks which is better 130mm or 140mm

any advice would be much appreciated, Thank you

Sam

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Old 2013-08-05, 12:57 PM   #2
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140 for trials 130 for street and flat, i prefer the kh for foot on crown trick and i hate the impacts neck length in long neck form, the impact has a better tire but the seat is like a wet noodle compared to the kh, if it were my money it would be a long neck kh with spirits
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Old 2013-08-06, 01:09 PM   #3
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Go the KH .. I have thrashed the crap out of mine and it is like new, strongest uni on the market without a doubt, I can see why it's such a pricey uni now, the impact is great too, it all comes down to personal preference I think.
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Old 2013-08-06, 01:28 PM   #4
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I like the kh overall, if the impact frame was longer in the longneck version and had better cranks it would be my favorite
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Old 2013-08-07, 06:25 AM   #5
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I was pretty underwhelmed with my kh20. The seat clamp failed on the first ride, the frame snapped after not much use and it was the worst built wheel I've ever owned. It was light and pretty, though. Just bought an Impact Muni frame, first impressions are good.
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Old 2013-08-07, 11:39 AM   #6
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Weird. What were you doing with it? Throwing it out of moving cars?
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Old 2013-08-07, 02:05 PM   #7
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In all fair ness. Snapped a kh frame and have a bent impact gravity frame but they are not ment to last for ever, amdahl the wheel is machines built so you NEED to tighten the spokes first ride.
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Old 2013-08-07, 05:53 PM   #8
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Older KHs had problems breaking. Newer frames are reinforced (I think 2011 and later)

Three of the five new unis I've gotten came w/ loose spokes.

Personally I'd get the KH for its versatility.

Also Moments (137mm on that uni) have a couple mm more Q-factor and Spirits one or two more than that. It seems most don't like QF, I do. I've ridden cranks w/ much more QF than Spirits and never tried a crank that had too much for me.
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Old 2013-08-08, 01:53 AM   #9
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I am not a huge fan of cranks with no q. But I broke a 2012 frame so I can't say much
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Old 2013-08-08, 07:05 PM   #10
UnicycleSam123
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Thanks for all the good advice, i have a few questions

1. what is Q factor?

2. what is wrong with the length of impacts long neck frame is it to long or to short? i am 6 foot 5 inches so am looking to get a frame that allows me to get the seat as high as possible

3. are the components of both compatible with each other e.g. putting a KH frame on an impact wheel set and putting KH cranks on an impact hub?

Thank you

Sam
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Old 2013-08-08, 08:05 PM   #11
minikumi
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Quote:
Originally Posted by UnicycleSam123 View Post
1. what is Q factor?
Q-factor is how much the crank bends outwards. So if it has zero Q-factor, the crank is completely straight and if there's 10mm Q-factor the pedal end of the crank is 10mm further away from the hub than the other end of the crank. Generally a bit Q-factor feels more stable when doing for example trials.

Quote:
Originally Posted by UnicycleSam123 View Post
3. are the components of both compatible with each other e.g. putting a KH frame on an impact wheel set and putting KH cranks on an impact hub?
Yeah, they are. As long as it's ISIS compatible you're good to go with pretty much anything.

From my own experience I'd recommend you to go for KH. It's got more advantages than Impact IMO, for example the seat, unless you upgrade to carbon fiber seat base the naomi with it's Velo base is reaally flexy and the wheelset which according to what I've seen is not quite as strong as the KH one. The Impact Gravity frame is a bit nicer for your knees but that's no big deal if you wear any shin/knee guards, which I strongly recommend you to do.

Lastly, if you are on facebook you should join the Unicycle Chat -group since most trial/street/flat riders have moved there from here. Muni and road advice here on the forums is superb though

Just my 2 cents, sorry for a bit long post

Last edited by minikumi; 2013-08-08 at 08:06 PM.
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Old 2013-08-08, 08:13 PM   #12
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Quote:
Originally Posted by skilewis74 View Post
Older KHs had problems breaking. Newer frames are reinforced (I think 2011 and later)

Three of the five new unis I've gotten came w/ loose spokes.
They've been reinforced since 2008.

A new wheel will make the spoke work and get the right tension, it's normal that the spokes loosen in the first few rides.

Quote:
Originally Posted by UnicycleSam123 View Post
Thanks for all the good advice, i have a few questions

1. what is Q factor?

2. what is wrong with the length of impacts long neck frame is it to long or to short? i am 6 foot 5 inches so am looking to get a frame that allows me to get the seat as high as possible

3. are the components of both compatible with each other e.g. putting a KH frame on an impact wheel set and putting KH cranks on an impact hub?

Thank you

Sam
1. The distance between both pedals.


Here is the difference between q-factors


2. I'm 6'3", I recommand you get a longneck frame, the KH also comes in longneck: http://www.unicycle.uk.com/unicycles...-unicycle.html

3. Pretty much everything is interchangeable.

Last edited by emile; 2013-08-08 at 08:16 PM.
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Old 2013-08-08, 08:33 PM   #13
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Originally Posted by UnicycleSam123 View Post
What is wrong with the length of impacts long neck frame is it to long or to short? i am 6 foot 5 inches so am looking to get a frame that allows me to get the seat as high as possible
Definitely be careful and steer clear of the KH regular frame pictured. The KH Longneck would be fine, but the regular frame is really short. I need a 400mm post to make it work and I'm only 6' 1" (rounding up...).
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Old 2013-08-08, 11:18 PM   #14
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I'm 6'4 and a long neck is a must, a impact longneck is a silly length. Kh is a lot better I just want a longer neck in general
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Old 2013-08-09, 09:54 AM   #15
UnicycleSam123
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Thank you for all the help

i think i have decided to go with the KH long neck but would the Monty eagle claw fit on the KH rim with the KH inner tube as it says it is wider or would i have to get a bigger inner tube as well?

Thank you

Sam
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