Frame size, new bike fitting, questions

Discuss light weight issues concerning road bikes & parts.
TobinHatesYou
Posts: 6431
Joined: Mon Jul 24, 2017 12:02 pm

by TobinHatesYou

trikobe wrote:
Wed Jul 29, 2020 7:54 pm

Fit is dialed in. Cant see myself going any lower or longer. Dont mind 5mm increase in stack if its a result of going to a larger size. Read here and reviews that SL7 has same geo as SL6 (although stack and reach numbers on paper arent the same), which has shorter reach and stack, as well as seat tube length than SL5. I can make both sizes work but worry that a 52 SL7 will show too much seatpost. As is, my old set up already has a lot post showing. Any thoughts appreciated. Thanks

The SL7 (and Venge) reach/stack omit the obligate ~1cm spacer. I was initially confused too. Once the spacer is included, the effective reach/stack will be the same as on the SL6.

That is also a borderline amount of seatpost. I would lean toward the 54cm.

by Weenie


jencvo
Posts: 168
Joined: Thu Oct 18, 2018 12:01 pm

by jencvo

What are the general recommendations for saddle angle? UCI rules were 0 degrees for a while, but what's best for aggressive riding position on road and/or gravel?

TobinHatesYou
Posts: 6431
Joined: Mon Jul 24, 2017 12:02 pm

by TobinHatesYou

jencvo wrote:
Sat Aug 01, 2020 11:30 pm
What are the general recommendations for saddle angle? UCI rules were 0 degrees for a while, but what's best for aggressive riding position on road and/or gravel?

Start with a neutral/flat position.

Tilting the nose of the saddle downward is a quick/dirty way to alleviate perineal pressure, especially for people with good hip flexibility. As long as you aren't shifting your weight onto your hands/arms, it's fine.

I can't think of a good reason why someone might tilt their nose up past neutral.

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okMX
Posts: 1
Joined: Thu Aug 06, 2020 10:21 am
Location: Europe

by okMX

Hey guys,

I'd like to get one of those bikes:
https://www.orbea.com/us-en/bicycles/ro ... t/orca-m30
https://www.giant-bicycles.com/us/tcr-a ... mpact-2021

I'm pretty tall, 2 meters (6'7) and my inseam is about 96 cm (37,7953 inch).

Giant Stack & Reach: XL = 596 & 412
Orbea Stack & Reach: 60 = 616 & 404

Does anyone of you ride those bikes and can give a feedback?
Do you think there is a chance or is it just a waste of time?
Giant labels size XL up to 1,99m and Orbea names for size 60 a height up to 2,07m. I'm tall but it seems like I don't have really long legs compared to my height.

Maybe somebody can give me an advice, would be awesome! :beerchug:

TobinHatesYou
Posts: 6431
Joined: Mon Jul 24, 2017 12:02 pm

by TobinHatesYou

The longer the torso, the more reach you need. Standover clearance and such don’t matter as much. Honestly at 6’7” you should start considering a custom frame or at least look for brands that still make 64cm frames.

Mr.Gib
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Joined: Fri Mar 18, 2005 4:12 pm
Location: eh?

by Mr.Gib

delete
wheelsONfire wrote: When we ride disc brakes the whole deal of braking is just like a leaving a fart. It happens and then it's over. Nothing planned and nothing to get nervous for.

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andreszucs
in the industry
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by andreszucs

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hannawald
Posts: 938
Joined: Sat Dec 17, 2016 7:28 pm
Location: Czech Republic

by hannawald

What is the consequence of too low stack? I mean if you have the reach right so you don't turn your shoulders forwards to compensate for too much reach and overload your neck and upper back muscles..? What overload would you feel due to slightly lower stack? Thank you.

NeverLetMeGo
Posts: 5
Joined: Thu Mar 21, 2019 5:12 am

by NeverLetMeGo

Good day, I am writing to you from a cold country where the very rich (or with average height) have the opportunity to try on a bicycle in person. My parameters: male gender, average flexibility, height 160 cm, legs 72 each, arms 50 cm. Tell me about the size listed below, thank you very much in advance.
https://www.merida-bikes.com/ru/bike/614/scultura-4000
Fits 38 41 44
Seatube 380 410 440
Toptube 491 500 515
HTA УГОЛ РУЛЕВОЙ КОЛОНКИ ГР 70 71 71
Head tube 95 100 120
Fork 375 375 375
Reach 359 367 376
Stak 493 499 519
Wheelbase 973 982 982
Standover 646 667 697

ccie6872
Posts: 39
Joined: Wed Jul 15, 2020 10:46 pm

by ccie6872

How should I be thinking about converting a road bike fit to a XC bike, ultimately to determine stem length? Here is the scenerio, my Factor 02 VAM, which fits me well, size 56 and looking to start a build of a new '21 Epic. The factor has a 392 and I have a 100mm stem = 492. If the Epic has a reach of 470, does that mean I should have a stem at 22mm? Seams really short?? I am sure there is something I am missing.

TobinHatesYou
Posts: 6431
Joined: Mon Jul 24, 2017 12:02 pm

by TobinHatesYou

ccie6872 wrote:
Sun Sep 13, 2020 2:13 pm
How should I be thinking about converting a road bike fit to a XC bike, ultimately to determine stem length? Here is the scenerio, my Factor 02 VAM, which fits me well, size 56 and looking to start a build of a new '21 Epic. The factor has a 392 and I have a 100mm stem = 492. If the Epic has a reach of 470, does that mean I should have a stem at 22mm? Seams really short?? I am sure there is something I am missing.

Keep in mind slacker HTA will change the effective stem length. You might also want a much higher stack height on an XC fit, which might allow for a longer stem.

icantaffordcycling
Posts: 1128
Joined: Wed Jan 09, 2019 5:03 am

by icantaffordcycling

In my opinion, you can't translate stack and reach from a road bike to an XC bike at all.

My personal fits -
Epic: 406mm reach + 90mm stem + 0mm reach bars
Road: 365mm reach + 117.5mm stem + 85mm reach bars

Both are stupid aggressive fits so that might not be super helpful for you but that's what works for me.

jencvo
Posts: 168
Joined: Thu Oct 18, 2018 12:01 pm

by jencvo

How much of a saddle setback as compared to center of BB do you guys run? I'm looking for aggressive aero position, where I can still put down power. I thought I had it dialed but then a friend who's about the same height and does really well in flat TTs measured his and his saddle is around 2.2cm closer to the center of bb than mine. I'm 194cm tall and measurements were taken wall to center of bb and wall to tip of the saddle. Current We're both running identical saddles as well.

Current distance from center of bb to tip of the saddle is ~11.6/11.7cm.

Cheers!

ccie6872
Posts: 39
Joined: Wed Jul 15, 2020 10:46 pm

by ccie6872

icantaffordcycling wrote:
Sun Sep 13, 2020 3:08 pm
In my opinion, you can't translate stack and reach from a road bike to an XC bike at all.

My personal fits -
Epic: 406mm reach + 90mm stem + 0mm reach bars
Road: 365mm reach + 117.5mm stem + 85mm reach bars

Both are stupid aggressive fits so that might not be super helpful for you but that's what works for me.
Thank you.. Curious, is the saddle to the middle of the bar distance about the same distance (compensating for different saddles)?

by Weenie


TobinHatesYou
Posts: 6431
Joined: Mon Jul 24, 2017 12:02 pm

by TobinHatesYou

jencvo wrote:
Mon Sep 14, 2020 8:54 pm
How much of a saddle setback as compared to center of BB do you guys run? I'm looking for aggressive aero position, where I can still put down power. I thought I had it dialed but then a friend who's about the same height and does really well in flat TTs measured his and his saddle is around 2.2cm closer to the center of bb than mine. I'm 194cm tall and measurements were taken wall to center of bb and wall to tip of the saddle. Current We're both running identical saddles as well.

Current distance from center of bb to tip of the saddle is ~11.6/11.7cm.

Cheers!

116mm is shitload of setback, but you’re also fairly tall... I’m 178cm and run 55mm of setback with a 250mm saddle, but I used to run 88mm with a 260mm saddle. I was able to adapt to either extreme without much issue, but I prefer the set-forward position more.

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