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Old 03-13-06, 11:11 AM   #1
JoeOxfordCT
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Surly LHT - Frame/Wheel sizing ?

Hi all,

Comtemplating purchasing a Surly LHT frame and using most of the components from my '05 Gary Fisher Hoo Koo E Koo to do the initial buildup to save money.
My questions are these:

According to Surly you can make the jump from 26' to 700cc wheels at the 56cm frame size. The last time I got fitted for a road bike I was a 56cm, (I'm 5' 10", normal proportions). Can I still use 26" wheels on a 56cm LHT frame ?

My other question is regarding frame size itself. Like I said, the last time I got fitted for a road bike I was a 56cm. (on a '05 Felt). This would be my first touring bike and I realize the geometries are different than on a pure road bike. Could I just go ahead and order a 56cm frame or should I try and find a shop with a LHT in stock ?

Thanks !!!

Joe
Oxford, CT. USA.
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Old 03-13-06, 11:32 AM   #2
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Quote:
Originally Posted by JoeOxfordCT
According to Surly you can make the jump from 26' to 700cc wheels at the 56cm frame size. The last time I got fitted for a road bike I was a 56cm, (I'm 5' 10", normal proportions). Can I still use 26" wheels on a 56cm LHT frame ?
No, you can't. If the frame had had disc brake mounts, you would've had that option, but as it is now, you won't be able to fit any rim brakes.

Quote:
Originally Posted by JoeOxfordCT
My other question is regarding frame size itself. Like I said, the last time I got fitted for a road bike I was a 56cm. (on a '05 Felt). This would be my first touring bike and I realize the geometries are different than on a pure road bike. Could I just go ahead and order a 56cm frame or should I try and find a shop with a LHT in stock ?
I'm 5'10", 33.5" inseam, and I ride a 54 cm LHT without any problems. And I've even got a short stem (60 mm). The size difference between a 54 and a 56 is fully possible to negate using stem length, saddle position, saddle height and so on... And even if you were fitted to a 56 cm that one time, that doesn't mean that holds true for an LHT.
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Old 03-13-06, 12:18 PM   #3
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CdCf,

I understood your point regarding frame size but you lost me on the wheel size question I posted....can you still use 26" wheels on a 56cm frame ?

Joe
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Old 03-13-06, 12:26 PM   #4
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Quote:
Originally Posted by JoeOxfordCT
CdCf,

I understood your point regarding frame size but you lost me on the wheel size question I posted....can you still use 26" wheels on a 56cm frame ?

Joe
Sure, you can mount 26" wheels on 700c LHT's.....but you're have brake mounting problems.
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Old 03-13-06, 02:04 PM   #5
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Yes, the brake locations are rim-size specific. A 700C rim has its brake surface approximately 30-31 cm from the hub, while a 26" rim is smaller, and expects a brake pad at about 28 cm from the hub. If you mount 26" wheels with brakes mounted at the proper location for a 700C rim, the brake pads will end up scraping the top of the tyre, and miss the rim completely...

Disc brakes require only a disc brake mount on the fork (and a disc brake-compatible hub/wheel), so they're independent of wheel size. Too bad the LHT doesn't have them. Big mistake by the Surly guys, in my opinion. I guess that spare spoke holder made more sense to them...
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Old 03-13-06, 02:20 PM   #6
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Oh !
Ok, now I understand....oh well...
I'd have to order a 54cm then to get it to work with my mtb components......
hmmm

Thanks guys !!

Joe

Quote:
Originally Posted by CdCf
Yes, the brake locations are rim-size specific. A 700C rim has its brake surface approximately 30-31 cm from the hub, while a 26" rim is smaller, and expects a brake pad at about 28 cm from the hub. If you mount 26" wheels with brakes mounted at the proper location for a 700C rim, the brake pads will end up scraping the top of the tyre, and miss the rim completely...

Disc brakes require only a disc brake mount on the fork (and a disc brake-compatible hub/wheel), so they're independent of wheel size. Too bad the LHT doesn't have them. Big mistake by the Surly guys, in my opinion. I guess that spare spoke holder made more sense to them...
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Old 03-13-06, 02:38 PM   #7
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Quote:
Originally Posted by CdCf
I'm 5'10", 33.5" inseam, and I ride a 54 cm LHT without any problems. And I've even got a short stem (60 mm). The size difference between a 54 and a 56 is fully possible to negate using stem length, saddle position, saddle height and so on... And even if you were fitted to a 56 cm that one time, that doesn't mean that holds true for an LHT.
CdCf, my measurements are similar to yours. I am 5'10", 34" inseam. I ride a 56cm road bike with a 110mm stem. I am considering a Surly LHT, and I really prefer 26" wheels. Would you say I can buy a 54cm frame and fine-tune the geometry and measurements with stem(s) to dial-in the fit, without feeling cramped on the bike or significantly impacting the bike's handling characteristics in a negative way?

This is gonna be my first touring-specific bike, and I understand that one really does want a little bit stretched out body position on a touring bike, as opposed to a racing bike. Or am I wrong?

I really prefer 26" wheels, otherwise I would go for the 56cm frame.

Thanks.

Regards,
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Jed
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Old 03-13-06, 03:30 PM   #8
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I can't promise you that. All I know is that I'm comfortable. I imagine I'd feel really stretched out on your road bike.

My first (adult) bike was a 57 cm MTB frame (its geometry is quite similar to the LHT's), with a 90 or 100 mm stem. My back hurt, my hips hurt, my shoulders hurt, my elbows and my wrists hurt. I couldn't (well, I could, but only for a few seconds) bend over far enough to even flex my arms - they were locked straight out!

This LHT is only my second, so don't see me as an authority on bike fit...
BUT, I know about my experiences, and my LHT feels great to me.

This is my LHT in its current winter config:
http://img128.imageshack.us/img128/9274/13hm2.jpg
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