Questions tagged [bike-fit]

How to get the right sized bicycle for you or adjust your bicycle to fit you better.

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39 views

Surly disc trucker 26 frame size

I am 176 cm height (with 85 cm inseam). What will be my frame size for Surly disc trucker 26? Will size 56cm fit or be too big? I cannot find a size for this model. Thank you in advance for your help.
5
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2answers
219 views

Why are so many ramps on dropbars tilted downwards?

When looking at drop handlebars, it's noticable that most ramps are tilted downwards. I find that rather uncomfortable for my hands as they slide down into the hoods of the brake levers and get ...
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2answers
1k views

Why don't seat tube lengths on modern bikes match their assigned sizes?

I was under the impression that bikes were sized according to the seat tube length; thus, a 56 cm frame would have a 56 cm seat tube length. However, on some modern bike frames (see Specialized Tarmac ...
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2answers
136 views

Optimal front / rear weight ratio

What is your preferred weight ratio between front to rear wheels on your bike(s)? I always assumed 40% front / 60% rear was "normal". I have been experimenting with tire pressure and stem ...
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1answer
84 views

Steering Dynamics Question

as I contemplate reducing reach by either 1/ shortening my stem or 2/ shortening my dropbar's reach, I have some questions about whether approach 1 or 2 will have a greater difference on my bike's ...
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3answers
190 views

Properly sizing a frameset online (Ritchey Road Logic)?

Longtime lurker, first-time poster. My frame is cracked and I have mostly decent parts so I am thinking about just buying a frameset and paying the LBS to move stuff over. A friend suggested I look ...
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0answers
42 views

Can a 2cm lower ETT and 3cm lower stack make a big difference

I have recently been testing two mountain bikes: one with a 44cm (~17.5") frame, which I bought second-hand and one with a 45.7cm frame (~18"), which I bought new but want to return it as I ...
9
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2answers
478 views

How to tell if my handlebar is really too long?

As some of you already know, I'm putting together a trekking bike. It is mostly to commute where the usual route will be 15km: up to 10km on paved roads and the rest unpaved, including a highway ...
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0answers
49 views

How can I measure a saddle to buy something similar?

I got on quite well with the stock saddle on my tourer, until recently. That's not surprising as the plastic has broken. The bike manufacturer isn't great for spares, and I'm sure I could do better, ...
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1answer
38 views

Finding dropbar's exact measurement

I have a GT Grade and I'm planning to swap out the drop bar for something with a smaller reach. It's really easy to find the specs of the replacement bars, but harder to find the drop, reach, and ...
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1answer
162 views

Caad10/12 sizing

I'm looking to buy a used CAAD 10 or 12 but since they are quite far away, I can't test ride them so I'll have to guess the correct size. I am 173cm tall and an inseam of barely 80cm without shoes. I ...
6
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1answer
190 views

Saddle Position

I am a newbie to biking. I got my bike fitted in a local bike shop. I feel comfortable riding it. However, I feel (by looking at it) that the saddle is fitted way too back. It looks as if the back ...
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1answer
195 views

Is my dropper post too long?

I got a bicycle with a dropper post. As you know, there is currently a bicycle shortage, which is why I ended up getting it online instead of in a local shop (none of which had in stock what I was ...
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1answer
335 views

Options to reduce reach on a gravel bike

I bought a 2020 GT Grade shortly after the pandemic hit. Bought it online, no test drive. It was a bit of a risk, but it seems to fit well enough with one exception: the reach feels a bit long. When I ...
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2answers
100 views

Change bike fit to reduce amount I “lift up” on my pedals

It's folklore than a benefit of clipless pedals is that you can generate power while pulling your foot "up" as well as pushing it "down". I've noticed that under very particular ...
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2answers
269 views

What's the approximate stack and reach for a 5'10" 178cm man

The top-tube length is no longer a good measurement for sizing a bike. Stack and reach are better for reasons I won't reiterate here. The problem is, while there are many lookup tables and calculators ...
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1answer
86 views

bike fit calculator on competitivecyclist.com, accessing from .de [closed]

I wanted to open https://www.competitivecyclist.com/Store/catalog/fitCalculatorBike.jsp and got redirected to bergfreunde.de (outside the U.S. due to GDPR regulations) Before I resort to VPN or ...
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99 views

Specialized Tricross Sport size guide?

I have an old Specialized from 2009, it seem pretty fine across the year, but I think the frame is too big for me. I adapt my body other the year, ride a lot, and doesn't make discomfort. After a big ...
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2answers
167 views

Is it possible to set this fork steerer / stem higher?

Is it possible to set the stem / steerer higher in Cannondale R300? It feels like I need higher stack and I wouldn't like to tilt the drop bars from their current position. Bonus question: are stem ...
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5answers
367 views

Is 160mm crank too short for me?

I’ve done some research about crank length. When I’m riding full-gas my knee is starting to hurt but when I’m just chilling in group rides I feel alright. My crank length at the moment is 172.5mm and ...
3
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2answers
103 views

City bikes— frame sizing for smaller cyclists

I'm a 5'1" woman looking to purchase a classic bike for transport/leisure. Unfortunately here in the London and in neighbouring cities/countries, I can only find 17"+ frames available. Most sizing ...
2
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1answer
72 views

Road bike fitting: Fit calculator results look slightly different with the bike I am planning to purchase

I am planning to purchase a Triban RC 120. My height is 181.3 cms and I am planning to get an L sized model. Since I am new to road biking, after reading about it for a bit, I decided to get the bike ...
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1answer
59 views

Road bike frame sizing

I found an old racing road bike with a 50 cm frame. I would like to build it out and use it, but I am concerned it may be too small for me. I'm 5' 7.5" and I think I should be riding a 54 cm frame, ...
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1answer
94 views

How do I adjust my child's bike shown in this video to improve fit and comfort?

Timeline Provided because I learnt a lot in the process My 5yo daughter has started growing out of her Apollo Petal with 14" wheels and an upright position typical of a child bike. Basic research ...
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7answers
2k views

Is my bike a good fit?

I am a woman and I have been wanting to get into cycling. A few summers back I bought a gravel bike. I bought it new from a local bike shop that I trusted. The bike was considered a 'medium' (5'6-5'9 ...
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0answers
44 views

Would too small of a mountain bike frame cause lower back pain?

I'm just under 6' 2" and recently got a Large transition patrol. I'm right on the cusp of needing an XL frame. Anyway, I had a Large patrol before and am noticing now as I did then that my lower back ...
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2answers
75 views

What adjustments can you do to prevent psoas tightness in an aggresive postion on a road or track bike?

I have been paying attention to my own body and I feel that together with a sedentary job and not moving more than with the bike due to the COVID restrictions, I spend a lot of time in that shortened ...
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2answers
999 views

I'm a 5'9 male- is this 51cm frame road bike too small?

looking to get into this and after a fair bit of looking I've found this bike. Photos here: https://www.gumtree.com.au/s-view-details.html?adId=1245748386 It says 51cm frame and Medium, but ...
8
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3answers
2k views

I think I chose the wrong road bike size

I went to a local bike shop a couple days ago and picked up a road bike. I think I chose the wrong size. I bought a medium size instead of a small. I’m 5’7 and I feel comfortable during the first two ...
2
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1answer
57 views

Hybrid bike size issue.. help?

in need of help. Looking at buying a hybrid bike. Anxious on getting the correct size. Different sites say different things for the size I require. The bike I’m looking at is the carrera subway 1 men’...
2
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1answer
236 views

Building a 700c bike. Hub sizes

Trying to build a bike on a cyclocross frame. So the wheel will be 700c. Need hubs. Fork size is 100x15 with thru axle. Rear drops size 142mm x 12mm thru axle also. So it means I need any hubs which ...
5
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3answers
2k views

Is my saddle at the correct position?

I am trying to determine if my saddle is setup right. In the picture below, my feet is at 9 o'clock and the improvised plum line that starts under my knee cap (hard to see, spot the white line ...
3
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3answers
1k views

Alternatives to shorter cranks for knee pain

I've recently developed pain at the front of my knees when cycling. I suspect this is caused by, or at least made worse by, my bike having cranks that are too long for my leg length (172.5mm cranks ...
3
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1answer
369 views

Balance bike: fitting smaller wheels

I'm building a balance bike for a daycare kid. He is tall so I have a longer frame for him, but I think the tires might he too big. Can I put 12.5" tires on forks for 16" tires?
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58 views

Bugging out on bike fit frame size

I recently upgraded to a new bike (Tarmac 2019) and got a size 58. I also got a bike fit by a local fitter. When we finished the fit there were a few tweaks including moving the saddle up several cm (...
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5answers
3k views

Adding gears to my grandson's 12" bike

My grandson has the kind of bike you pedal backwards to brake, and he goes riding with me on my days off. Yesterday, he asked me if we can convert his bike because we have looked everywhere and no ...
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1answer
66 views

Replacing broken road fork with same model but shorter steerer tube. What can I expect for handling issues?

My road bike is an '05 Trek 1000 54 cm frame size. The Bontrager carbon fork (Satellite Plus) was destroyed in a non riding accident. I have found on eBay a replacement fork--same model , identical ...
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0answers
166 views

How many degrees does the stem of a Canyon integrated cockpit rise?

I am plotting a Canyon Ultimate bike on BikeCad, but I can't find how many degrees the stem rises. The stem is part of the Canyon H36 integrated cockpit. In general, manifacturers of integrated-stem ...
0
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1answer
4k views

Mountain Bike has 26 x 2.125 Tires on, Can I Fit 26 x 1.95? [duplicate]

My mountain bike has 26 x 2.125 tires on it and I am ordering new 26 x 1.95 tires. Will these be okay to use? What issue might this cause? Or will the difference be negligible?
0
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1answer
178 views

Can moving cycling cleats forward be a good way to train our calf muscles?

A good bike fit is known to increase power transfer and endurance because it balances our muscle groups. Interestingly, bike fitters often recommend moving the cleats back to put less load on our ...
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2answers
584 views

Would longer axle to crown be ok?

I have a Trek 820 2014 26 inch for which I had the lbs convert to rigid fork. The original suspension fork was a suntour m3030 which the manufacturer states has a 63mm travel for my bike size. I lost ...
1
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1answer
188 views

Bike Fit for 5'3" (1.60m) woman, 47 or 51 cm?

My issue is that I have a 51 cm Cervelo, but the reach is too far. I've tried changing out handlebar stem to shorter/angeled, spacers and smaller handlebars. That helped some, but still a little too ...
1
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1answer
126 views

How should a bicycle fit? [closed]

What are the characteristic features of a bicycle well-fitted to its rider? Are there a standard set of "rider positions" that we talk about in bicyle ergonomics? What are the standard tolerances ...
1
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1answer
725 views

Is a 22 inch road bike appropriate for a 5'9" person? [closed]

I am admittedly a beginner and looking to purchase a used single speed bike just to casually use around the neighborhood. I came across this listing: https://nashville.craigslist.org/bik/d/...
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3answers
2k views

Bike fit: Adjusting stem angle vs. height

I'm playing with my fit a bit as I have gotten much more flexible since I had a bike fit 2 years ago (+1 to stretching and foam rolling.) As I'm experimenting with drop I am wondering if it makes ...
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1answer
1k views

Bike size advice Bianchi vs Cannondale

I have been after a Bianchi Via Nirone 7 for more than one month and an half without much success. The main reason is that they don't produce many 47cm frames, while 47cm would be my optimal size. In ...
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3answers
143 views

Anything wrong with using MTB saddle on hybrid bike

I'm been having problems with fit on my hybrid. When I spend around 1hr on the saddle I start to get pain in the left prostate. I can no longer ignore the problem because I plan to do C2C. Right now ...
1
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1answer
286 views

Since seat tube angle has little effect on max power output, why not adjust the reach with saddle setback?

According to this article, a seat tube angle between 65 and 110° has little effect on max power output. At most, it varied 1%. https://www.me.utexas.edu/~neptune/Papers/jab26%284%29.pdf Adjusting the ...
3
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4answers
111 views

Fitting question for first trekking bike - differences in stack and reach

I understand this might be a pointless/dumb question, but as an bike freshman, I am confused: Trying to select an entry level first bike (cross/hybrid) and so far I'm between two of them (local EU ...
0
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2answers
406 views

New bike but no idea on inner tube size

I bought a new bike a few days ago, Cannondale Bad Boy 3 2019 which gets delivered in a few days. https://www.cannondale.com/en/Europe/Bike/ProductDetail?Id=7f48452b-f9eb-4e10-89e7-4a7550944bfa ...

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