Bike Sizing?

Wedge a big book up under your undercarriage as if you were sitting on it like a saddle. Push it hard up there and hard against a wall, making sure it's top is horizontal. Bare feet, flat on the floor. This is easier with an understanding assistant :) When you have the book all setup, mark a line on the wall at the top of the spine.. use this for further calcs to get a saddle height start point.

did for me! after about 7 miles my lower back is aching. it's why I'm going to the bike whisperer, they love you over there.

Chebeef, if you can scrape together something around £85 they're apparently pretty good.

Thanks Jayloo,

After measuring correctly my inseam is 85cm (33.5 inches) the calculator results look fine.

Measurements

Inseam: 85
Trunk: 70
Forearm: 34
Arm: 69
Thigh: 61
Lower Leg: 58
Sternal Notch: 149
Total Body Height: 181

The Competitive Fit (cm)

Seat tube range c-c: 55.1 - 55.6
Seat tube range c-t: 56.8 - 57.3
Top tube length: 57.0 - 57.4
Stem Length: 11.7 - 12.3
BB-Saddle Position: 79.1 - 81.1
Saddle-Handlebar: 55.5 - 56.1
Saddle Setback: 4.4 - 4.8

The Eddy Fit (cm)

Seat tube range c-c: 56.3 - 56.8
Seat tube range c-t: 58.0 - 58.5
Top tube length: 57.0 - 57.4
Stem Length: 10.6 - 11.2
BB-Saddle Position: 78.3 - 80.3
Saddle-Handlebar: 56.3 - 56.9
Saddle Setback: 5.6 - 6.0

The French Fit (cm)

Seat tube range c-c: 58.0 - 58.5
Seat tube range c-t: 59.7 - 60.2
Top tube length: 58.2 - 58.6
Stem Length: 10.8 - 11.4
BB-Saddle Position: 76.6 - 78.6
Saddle-Handlebar: 58.0 - 58.6
Saddle Setback: 5.1 - 5.5

I really need to get my shit together and get a TT position sorted and this bike built and give them back their frame spacers. Good customer fail.

I just talked to him a day or two ago and he mentioned you and that you were helping them out. Nary a flash of annoyance on his part, but yeah.

Wedge a big book up under your undercarriage as if you were sitting on it like a saddle. Push it hard up there and hard against a wall, making sure it's top is horizontal. Bare feet, flat on the floor. This is easier with an understanding assistant :) When you have the book all setup, mark a line on the wall at the top of the spine.. use this for further calcs to get a saddle height start point.

Remember when we realised doing this could be used to measure inside leg as well; that was a fun evening. Though I still feel bad about using the Bible. And even worse about sniffing the cover in church the next Sunday.

Remember when we realised doing this could be used to measure inside leg as well; that was a fun evening. Though I still feel bad about using the Bible. And even worse about sniffing the cover in church the next Sunday.

Bike on a Christ!

Just resurrecting this thread to get some reassurance on choosing the right size new frame. These are the measurements I got from competitive cyclist:

Measurements

Inseam: 30
Trunk: 23.5
Forearm: 14
Arm: 22.5
Thigh: 24
Lower Leg: 21.5
Sternal Notch: 56
Total Body Height: 66.8

The Competitive Fit (cm)

Seat tube range c-c: 49.3 - 49.8
Seat tube range c-t: 50.9 - 51.4
Top tube length: 52.5 - 52.9
Stem Length: 10.2 - 10.8
BB-Saddle Position: 65.1 - 67.1
Saddle-Handlebar: 49.6 - 50.2
Saddle Setback: 3.2 - 3.6

The Eddy Fit (cm)

Seat tube range c-c: 50.5 - 51.0
Seat tube range c-t: 52.1 - 52.6
Top tube length: 52.5 - 52.9
Stem Length: 9.1 - 9.7
BB-Saddle Position: 64.3 - 66.3
Saddle-Handlebar: 50.4 - 51.0
Saddle Setback: 4.4 - 4.8

The French Fit (cm)

Seat tube range c-c: 52.2 - 52.7
Seat tube range c-t: 53.8 - 54.3
Top tube length: 53.7 - 54.1
Stem Length: 9.3 - 9.9
BB-Saddle Position: 62.6 - 64.6
Saddle-Handlebar: 52.1 - 52.7
Saddle Setback: 3.9 - 4.3

Heres a chart of my size options for the frame:

http://www.nelsoncycles.co.uk/Track_geometry.htm

The 'get a slightly smaller track bike' logic would suggest that I should go for the smallest size since Competive cyclist recommend that I should be riding a 52/53cm road bike.

However I have been riding a 56cm road frame for nearly a year and an even larger one before that. So ive got really really used to the feel of larger frames with super short stems.

I put my measurements into the calculator, and the results which come out match both my bicycles' setups on all measurements to within millimetres for the competitive fit.

How very conformist. :P

Did they have any comment on the socks though, Matt? ;p

Apparently they weren't long enough!

I went to see Scherrit at the Bike Whisperer (http://www.thebikewhisperer.co.uk/) last night and he did an incredible job getting my road bike fitting me just right. Scherrit himself is a track rider, but seems to have an ability with every type of bike so I felt in really safe hands. I was advised to go see him by my friend who is a medal-winning National Masters* *Track rider so i knew it would be £85 well spent - but I was amazed at what Scherrit managed to do: the ride home last night was an absolute dream! I felt totally in control (a new sensation I must admit!) and I had none of the usual twinges I get from my bike. Can't recommend this highly enough.

could anyone help me out? I'm looking to build a road commuter/ occasional touring fixed, what frame size would i need? here are my measurements Measurements

Inseam: 78
Trunk: 59
Forearm: 33
Arm: 64
Thigh: 53
Lower Leg: 54
Sternal Notch: 147
Total Body Height: 185

for a start you could look here > http://www.competitivecyclist.com/za/CCY?PAGE=FIT_CALCULATOR_INTRO

then throwing that data over your shoulder, go and spend some money on a professional bike fit; here they'll discuss with you your riding aims, style and postural defects (we all have them).

if you are london based, scherrit of these forums is well regarded.

Chaps,

I'm 5, 8" in height - what sort of frame size range am I looking at please? thanks all in advance, and sorry if it seems a bit dense!!

:)

54cm.

next.

ha ha thank you :) and apologies again

53.5cm.

next.

54.2cm

next.

Get a red one.

Get a Sram Red fixeh

Go to a reputable bike shop and try out some of their bike, then go for the one that felt comfortable.

ignore seattube length.

ignore seattube length.

Very much so!

If it is a bike with drop handlebars, make sure you can hold the drops comfortably. Also avoid bikes with unusually long cranks. If it is a road bike, 170mm is what you need. Some cheaper bikes bung 175mm on every size.

If they are drop bars or bullhorns, make sure they are a comfortable width.

Get one of them Creates from Urban Outfitters. They only come in two sizes so you've only got a 50% chance of getting it wrong.

A medium Langster.

thanks guys, Im looking at a Giant Defy 5 Triple 2012 - in medium/L size :)

http://www.rutlandcycling.com/34469/Giant-Bikes-Giant-Defy-5-2012-Triple-Road-Bike.html