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PostPosted: Wed Oct 11, 2017 8:39 am 
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Location: Vienna Austria
I've successfully built without, but even with thoroughly greased seats friction is on the high side.


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Posted: Wed Oct 11, 2017 8:39 am 


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PostPosted: Sun Oct 15, 2017 8:49 pm 
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Right then. Hill climb season draws to a close. I'm planning on putting together a HC bike for next year. The question is: what rims? These are special use raceday wheels, and unless I win the lottery, ax lightness 25s are out of the question.

So, very light tubs on the cheaper end of the scale? I'm 72Kg.

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PostPosted: Sun Oct 15, 2017 10:11 pm 
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MattSoutherden wrote:
So, very light tubs on the cheaper end of the scale? I'm 72Kg.


LB?

https://www.lightbicycle.com/25mm-deep- ... rface.html


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PostPosted: Sun Oct 15, 2017 10:22 pm 
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Yeah. LB 25, or 35+25 was one possibility. Maybe the Yishun 33 tub?

How true are the weights?

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PostPosted: Mon Oct 16, 2017 11:17 am 
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My LB rims (2 pairs of clinchers, 25 + 35) were at the claimed weight.

25x25 clincher set on Bitex RAR is 1280g BTW.


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PostPosted: Mon Oct 16, 2017 11:23 am 
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I'm also looking to build a hill climb wheelset.
Lightest rims I've seen are from Far Sports. Not sure if anyone has any feedback on any of the sub-300g rims in particular, or their wheels in general?

http://www.farsports.cn/product/detail.php/id-20.html


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PostPosted: Mon Oct 16, 2017 12:09 pm 
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I just found those as well. Just asked about the wheels in the open mould wheel thread.

I think it would be just over 1Kg for the 24x20 front and a 30x23mm rear. Given I'm currently 72kg (was closer to 71 last year, but have been very lax this season) I thought the 30 would be more solid under power.

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Last edited by MattSoutherden on Wed Oct 18, 2017 10:29 am, edited 1 time in total.

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PostPosted: Mon Oct 16, 2017 1:06 pm 
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Yeah, 30mm on the rear might be a sound option.
I'm usually a little under 65kg on race days, but it would provide added peace of mind.
If feedback on the rims is good, I'll prob get them built with carbon ti hubs.

What's the thinking behind having a wider rim just on the rear?


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PostPosted: Mon Oct 16, 2017 1:13 pm 
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Location: Vienna Austria
I'm between 75 and 78kg and my 25x25 clinchers are built with 24 thin spokes in the rear, and they are easily stiff enough for me. No idea how 20mm tubs would fare though.


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PostPosted: Mon Oct 16, 2017 1:25 pm 
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sib wrote:
What's the thinking behind having a wider rim just on the rear?


They are much stiffer. Thought it would make it a bit more robust when honking away on the short HC courses. I was thinking of a light-ish 23mm tub on the back and something silly on the front. The front it basically just to stop the fork scraping on the ground. :lol:

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PostPosted: Wed Oct 18, 2017 12:23 am 
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Location: Glermsford, Suffolk U.K
What hubs are you thinking of using MAtt? I have a set of 38mm 20.5mm deep tubular with carbon Ti hubs that weigh 1020g. I you went with extralite hubs and 20F/28R spoke count you could go even lighter ~940g

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PostPosted: Wed Oct 18, 2017 10:52 am 
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Probably Carbon-Ti. I guess that means I'm looking at about the weight of yours. I presume yours are using cx-rays with alloy nips? The rear wheel I was racing with this year weighs over 1100g on its own. :shock:

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PostPosted: Wed Oct 18, 2017 11:12 am 
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bm0p700f wrote:
I have a set of 38mm 20.5mm deep tubular with carbon Ti hubs that weigh 1020g


I had a look on your website but couldn't find anything.
Do you have a link to these wheels, or are they special order? How much do they cost?


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PostPosted: Fri Oct 27, 2017 12:54 am 
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Any Light 26" clincher rim recomendation with 17-19mm internal width and 24-28 holes? (Carbon or alloy rim for disc brake)

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PostPosted: Fri Oct 27, 2017 10:17 am 
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Location: Glermsford, Suffolk U.K
I only have one pair of rims so I have hidden the listing so I have rims in case some customers have a crash repair requirement. There is a wider version of the rim that j am tempted to get on my next rim order I have had them before and they weigh 20g more.

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Posted: Fri Oct 27, 2017 10:17 am 


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