Bike Geometry

fattony

Regular
I’m at a complete loss with this, I have a 2014 Boardman CX Comp and I’m looking at upgrading to a Giant TCR Advanced 2.

Is there anywhere I can get a geometry spec for the boardman as the Giant website says the XL is right for my height but measuring the top tube on the boardman it’s quite a bit bigger (believe the boardman is a 58)

thanks
 

YukonBoy

The Monch
Location
Inside my skull
Tap on the geometry link at the bottom of page on the giant webpage for this bike.
 
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fattony

Regular
The giant one I can find but I wanted to compare it to the boardman, due to the age of it I can’t see where I could find the geometry for this frame?
 
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fattony

Regular
Thanks, the seat tube on that is showing 57.5cm, I measured mine but not sure if it’s to the top of bottom of the seat post clamp (see photo)

I’m trying to work out if I would be better with a L on the Giant TCR rather than XL

The Giant website states the L is upto 6ft 2 and the XL starts at 6f 2, I’m 6ft 2 and thinking the XL is quite a bit bigger than the boardman, dont want to be over reaching
 

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vickster

Legendary Member
If in doubt get the smaller framesize. Best thing would be to try the Giant out. A TCR is going to be a racier geo than the Boardman I should think

Remove the seatpost clamp so you can see the top of the tube to measure?
 
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fattony

Regular
If in doubt get the smaller framesize. Best thing would be to try the Giant out. A TCR is going to be a racier geo than the Boardman I should think

Remove the seatpost clamp so you can see the top of the tube to measure?
I’m just trying to work out how you actually know what size to buy and I can only base it on the boardman I have now ( this is a gravel bike though)

im looking at a few bikes (2nd hand upto 2/3 years old)

Giant TCR
Trek Domane
Cube Attain GTC
Specialised Tarmac

Are they all pretty much the just difference manufacturer, is there anything I should look out for when buying carbon 2nd hand?

thanks
 

CanucksTraveller

Macho Business Donkey Wrestler
Location
Hertfordshire
I’m just trying to work out how you actually know what size to buy and I can only base it on the boardman I have now ( this is a gravel bike though)
There's only two ways really, the first is (obviously) to try one - and I know that's not always possible. So if that's not available it's just a case of looking at the size guide on the manufacturer website. Sizing doesn't really change so the current TCR sizing for example will be very similar if not identical to 3 years ago. The tip there (as Vickster says) is that if you're between sizes, always err on the smaller side. You can make a slightly-too-small bike fit you quite easily, but it's not practical to make the slightly-too-large bike fit.
I've bought a Giant TCR, a Giant Defy, and a Genesis TdF, all blind (without trying them) using just the size guide and all were right and nice to ride. It's not the most foolproof method but it's common for people to do it and I've not heard any real horror stories.
 

vickster

Legendary Member
I’m just trying to work out how you actually know what size to buy and I can only base it on the boardman I have now ( this is a gravel bike though)

im looking at a few bikes (2nd hand upto 2/3 years old)

Giant TCR
Trek Domane
Cube Attain GTC
Specialised Tarmac

Are they all pretty much the just difference manufacturer, is there anything I should look out for when buying carbon 2nd hand?

thanks
Any damage to the frame, crash history (eg has it been raced)
Of your selection, they are all race Oriented bikes other than the Domane which is more relaxed (I think the Emonda is the racy one).
 

CXRAndy

Guru
Location
Lincs
If on the border with two frame sizes, its wiser to get the smaller frame. You can add longer steer'r stem, which will make the bikes handling feel more planted.

The word of caution is 'stack' height, being lower on smaller frames. Again this can be mitigated by an angle stem.
 

Mr Celine

Discordian
Location
Not Ingolstadt
If you are in between sizes and you have long legs for your height get the larger frame. If you have short legs for your height, or are 'normally' proportioned get the smaller frame.
Whichever size you get you will spend your entire time riding it with the nagging doubt that it is the wrong size.
 

DRM

Veteran
Location
West Yorks
Check the frame carefully for cracks/damage, see if the seat post is free to move, general condition, does it appear looked after, non rusty drive train & no play in bb or head set, are the tyres ok, no out of true wheels, ask about it’s history, the owner should be able to tell you in detail all about it, if not is it stolen is what I would be thinking, ask to see the owners manual & receipt
 
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