Giant OCR 4 sizes - help please

[Calvin]

I'm looking for a budget racing bike for my son for his 12th
birthday. Within my budget all I've seen is a Halfords TCR 2 in small
which I know is an OK size for him as his brother has one, at £230.
That bike's OK, it works perfectly well, but I'd really like to get
something a bit different just so they don't have exactly the same.
Not only that but I've had experience of buying from Halfords and it's
not fun.

I've been offered a Giant SCR 4 at a LBS which looks good but it's
just a bit too expensive at £315. The one in the shop was the right
size but I foolishly didn't notice which size frame it was.

Tonight I've noticed that Wiggle are offering the Giant OCR 4 at £250
but they don't have all of the sizes - they've only got a "51" (cm I
guess). So at last the question: does anyone have an OCR 4 51cm which
they could measure for me? I really need to know the stand-over
height, the height of the top of the seat stem from the floor and the
minimum "reach" from the front of the seat to the handlebars.

I must admit that I'm making the assumption that the OCR and SCR
ranges have different frames and aren't simply the same frame with
different components - if that were the case I could simply find out
what size SCR we saw today and I'd be sorted - anyone know?

Thanks for your help,
Calvin

[Jim]

Assuming that it's a Giant's "Compact Road" frame (I'm guessing that that's
what the CR is in OCR).
Here's the bumph from the Giant web site, again I would guess that Wiggle
are using the conventional frame size of 51cm meaning that the actual
seattube would be 44cm (i.e. a Small), it would be 51cm for the same sized
bike if it didn't have a sloping top tube.

Cheers
Jim J -sitting on a £700 Bike2Work vouchure :-)
Compact Road Sizing
Conventional Frame Sizing (cm) Rider Height Compact Road Frame Size
Seattube / Toptube Length (cm)
49-51 5'2" - 5'4" XS 42/52
51-54 5'4" - 5'7" S 44/53.5
55-57 5'7" - 5'10" M 50/55.5
57-59 5'10" - 6'0" M/L 53.5/57
58-60 6'0" - 6'3" L 55.5/58.5
61-63 6'3" - 6'6" XL 58.5/61

[Calvin]

On 15 Sep, 22:08, "Jim" > wrote:
> Assuming that it's a Giant's "Compact Road" frame (I'm guessing that that's
> what the CR is in OCR).
> Here's the bumph from the Giant web site, again I would guess that Wiggle
> are using the conventional frame size of 51cm meaning that the actual
> seattube would be 44cm (i.e. a Small), it would be 51cm for the same sized
> bike if it didn't have a sloping top tube.
>
> Cheers
> Jim J -sitting on a £700 Bike2Work vouchure :-)
> Compact Road Sizing
> Conventional Frame Sizing (cm) Rider Height Compact Road Frame Size
> Seattube / Toptube Length (cm)
> 49-51 5'2" - 5'4" XS 42/52
> 51-54 5'4" - 5'7" S 44/53.5
> 55-57 5'7" - 5'10" M 50/55.5
> 57-59 5'10" - 6'0" M/L 53.5/57
> 58-60 6'0" - 6'3" L 55.5/58.5
> 61-63 6'3" - 6'6" XL 58.5/61

Thank you so much for that, it makes a lot more sense now I realise
that they're not quoting anything I could actually measure on the
bike! Looks like I may have found something suitable at last.