frame size

radiation man

im thinking of buying the colnago clx 3.0 wiggle size chart says i should get a 48 frame, which is a standard english size of 52, my trek 1.5 is a 54 frame, im 165.5 cm tall 78.7 cm inside leg
seat angle 74.5
head tube 10.5 cm
top tube 54.4 cm
chainstay 41.7 cm
colnago 48
seat angle 74.5
headtube 12.9 cm
top tube 51.8 cm
chainstay 40.8 cm
does this size seem right

Grill

Seems reasonable. I'm 180cm and ride Trek in the same size as you...

StillGoing

radiation man wrote:

im thinking of buying the colnago clx 3.0 wiggle size chart says i should get a 48 frame, which is a standard english size of 52, my trek 1.5 is a 54 frame, im 165.5 cm tall 78.7 cm inside leg
seat angle 74.5
head tube 10.5 cm
top tube 54.4 cm
chainstay 41.7 cm
colnago 48
seat angle 74.5
headtube 12.9 cm
top tube 51.8 cm
chainstay 40.8 cm
does this size seem right

For me that 54 top tube is way too big for your height. At 5ft 5" the 51cm top tube would be about right unless you have a reach not proportional to your height.

Grill

Woah, I read your measurements wrong. Philthy3 is correct, that TT is too long and you'd need to compensate with a tiny stem. Go smaller

radiation man

the stem im using is a 110mm

Grill

Post a pic of you on your bike. I'm almost 7" taller than you and use the same size frame and stem in an aggressive (as well as forward) position...

darkhairedlord

Must have really long arms

StillGoing

I'm a similar height to you (OP) and use a 52cm relative top tube frame with a 100mm stem and bars as far down the steerer as I can get them in an aggressive position. I wouldn't want to go any bigger or the seat would end up on top of the top tube and the reach to the bars would be too much.

radiation man

my arm is about 57cms

radiation man

my seatpost setback is 20mm but to get the correct seat position my seat is as far forward as it will go and it still needs to go further so i will also need a longer bar stem then the 110mm i have now as im too close to the bars, thats all i can do or ill have to sell the bike

imposter2.0

You have the wrong size frame - sell it.

radiation man

everyone says ive got the wrong frame, so how have i managed for over 5yrs riding it, i have done lots of sportives on it and a 106 mile ride, does this mean that when i get the smaller frame i will be a lot quicker then before?

imposter2.0

radiation man wrote:

everyone says ive got the wrong frame, so how have i managed for over 5yrs riding it

Only you can answer that.

radiation man wrote:

i have done lots of sportives on it and a 106 mile ride, does this mean that when i get the smaller frame i will be a lot quicker then before?

It means you will have the right size frame. You will never know how much improvement that might make until you actually try it. The alternative is to carry on riding a frame which every single person on the planet has told you is too big.

darkhairedlord

On one of your many threads on this someone gave you a recommendation for a bike fitter. Try there. We have also asked several times for you to post a picture of you on your bike.if you ask for help and someone offers that help but needs a bit more info at least do so or no one will do anything for you. Perhaps you don't actually want any help at all. The fitter mentioned specialises in colnaga. Ps post your picture up so people can actually see if the frame is too big. I 'm 5'11" and ride a 56 trek 1.5 fake.

Monty Dog

More importantly, does it come in red and white?

radiation man

ill put a pic on today

diamonddog

OP I am the same height as you and the effective top tube length I have is 530 which gives a fairly racy riding position with a shorter stem than the 110 you have, IMO you need the next size down on the Colnago.

ugo.santalucia

If it turns out the frame is not red and white I'll lock the thread (and all the others)...

radiation man

here are the pics of me on the bike

darkhairedlord

Difficult to gauge your posture wearing a marquee but In the bottom pic it looks like the leg is over extending but the left leg to tight. I reckon you might need shorter crank arms. Frame size looks ok by you need to bend your elbows. That is why your posture is giving you a bad ride. Bend your elbows and you will be much more comfortable. You will find you could then flip your stem with little discomfort especially if you look up too . Buy some deda rhm bars. I'm no expert but someone else who is will probably chip in.

radiation man

my cranks are 170mm

earthvspace4XTuUWcX

As others have suggested, you would probably benefit from a proper bike fit. Your position is not ¨classical¨, and looks neither efficient of comfortable. Most of your weight seems to be directed through your backside. You look as if you are sitting to far forward, and your bars should be lower, and as darkhairedlord says, your elbows should be bent, and you should have more of your weight on the front of the bike. You are okay if on a shopping bike.

radiation man

so i should sell the bike and a 2cm smaller frame should make all the difference, i have already had a bike fit on this bike by a bike shop, guess they just tried to fit me to it instead of saying it was too big.

darkhairedlord

Suggestion:

Read all of your threads over the past year. Don't just skip through or cherry pick. Actually read what what you have asked and what people have said. Everything you are asking has been answered. If you want to spend £1700 on a new frame that's fine and I'm sure it will bring great joy to your life but FFS get a proper fit from someone that knows what they are doing first. If you are not confident on getting the size correct yourself get someone you are confident in, preferably with experience in the type of high end bicycle you want to buy.

And on that, I'm out!

cq20

I'm the same height as you but my inseam is 2cm shorter i.e. long body/short legs (especially femurs). Having ridden a couple of bikes I have access to, I tried one with a 54.5cm TT (10cm stem) and it was a bit of a stretch but by no means hugely uncomfortable. I tried a 52.5cm TT (10cm stem) bike and that was way way too cramped for me. So when I got a new bike, I decided to go with my existing size of 53.5 cm TT (10cm stem). The lbs offered to do a free proper bike fit and after all the measuring, inputting and number crunching, it produced a recommended TT of 53.8cm.

So, I would guess that 52.0/52.5 cm is in the right ball park for you (given your relatively shorter body compared to me) but, in any case you have to try it and other sizes out and make the final judgment yourself. Remember to be objective about your preferred riding style i.e. upright or flatter, on the tops or on the hoods (or even drops) and the saddle setback that suits you best. IMHO, there is no perfect answer and the outcome of a bike fitting is a starting point.

Also, looking at your photos, you have the stem flipped upwards and that would suggest that you like a more upright style. With that in mind, beware of going blindly towards smaller frames because, all other thing being equal, you'll also get a shorter head tube which will give a more aggressive riding position.

… but, at the end of the day, you have to personally try the options and make your own call.

radiation man

what is the measurement from the tip of the seat to the front of the bars

Grill

radiation man wrote:

what is the measurement from the tip of the seat to the front of the bars

You don't need to know this as it has no relevance to you. Concentrate on your fit, not others.

cq20

As per above, I'm reluctant to supply any specific data because it is only relevant to my (admittedly not perfectly proportioned) body, setup preferences and riding style. I 've tried to help by suggesting what I think is a reasonable start point but that is all it is. I would say the same about bike fit recommendations. You have to try the options from then on and make sure you are happy with your setup.