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Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

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Old 02-20-07, 07:38 AM   #1
astrx
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info on geometry of group buy IRO

i did a search and its hard to find anything concrete. went to the IRO website which didnt say much.

tubing is what?

geometry is more like the angus or mark V?

oversized/ovalized/angus style tubing?

thanks
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Old 02-20-07, 07:51 AM   #2
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Quote:
Originally Posted by astrx
went to the IRO website which didnt say much.
I doubt it.
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Old 02-20-07, 07:54 AM   #3
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let me rephrase. i went to the IRO website and found this:
Dedacciai Heat Treated tubing.

T/T:28.6x0.9x0.6x0.9

S/T:29.6x1.2x0.6x0.9

D/T:31.8x0.9x0.6x0.9

S/S:16x0.6

C/S:22.2x0.85x0.6x0.8

can someone tell me what this means as far as tubing (what bike is it similar to), geometry, shape of individual tubes?
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Old 02-20-07, 09:17 AM   #4
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Quote:
Originally Posted by astrx
let me rephrase. i went to the IRO website and found this:
Dedacciai Heat Treated tubing.

T/T:28.6x0.9x0.6x0.9

S/T:29.6x1.2x0.6x0.9

D/T:31.8x0.9x0.6x0.9

S/S:16x0.6

C/S:22.2x0.85x0.6x0.8

can someone tell me what this means as far as tubing (what bike is it similar to), geometry, shape of individual tubes?
They are round tubes. The first number is the tubing diameter. The following numbers are the tubing thicknesses. For example: the downtube is 31.8mm in diameter, and is double butted with thicknesses of .9 mm at the ends of the tubing and .6mm in the middle. It has the same geometry as the Angus.

Size


S/T c-c
T/T Length

H/T Angle
S/T Angle H/T Length Wheel Base B/B Drop C/S Length Stand Over
50cm 46 cm 52 cm 72.0 75.0 10 cm 95 cm 5 cm 39.1 cm 29.5"
53cm 49 cm 54 cm 72.0 73.0 10 cm 95.7 cm 5 cm 39.1 cm 30"
56cm 52 cm 55.5 cm 73.0 73.0 12.5 cm 96 cm 5 cm 39.1 cm 31"
59cm 55 cm 57 cm 74.0 73.0 15 cm 96.6 cm 5 cm 39.1 cm 32"
62cm 58 cm 59 cm 75.0 73.0 17.8 cm 97.5 cm 5 cm 39.1 cm 33.5"
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Old 02-20-07, 09:29 AM   #5
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Quote:
Originally Posted by polara426sh
It has the same geometry as the Angus.
It has the same geometry as the Mark V.
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Old 02-20-07, 09:33 AM   #6
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Quote:
Originally Posted by queerpunk
It has the same geometry as the Mark V.
Which has the same geometry as the Angus.

From the IRO site:
The frameet will have the same geometry as the Mark V and Angus.
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Old 02-20-07, 09:41 AM   #7
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Quote:
Originally Posted by polara426sh
Which has the same geometry as the Angus.
Which has the same geometry as the Mark V.
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Old 02-20-07, 09:43 AM   #8
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Yeah, but what's the geometry of the group frame like?
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Old 02-20-07, 09:46 AM   #9
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57cm in purple with 1 1/8" threaded!
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Old 02-20-07, 09:46 AM   #10
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Quote:
Originally Posted by br995
Yeah, but what's the geometry of the group frame like?
Two triangles welded together.
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Old 02-20-07, 09:48 AM   #11
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Quote:
Originally Posted by polara426sh
Two triangles welded together.
It has that little thingy coming off it though! Does that mean mine's a boy?
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Old 02-20-07, 09:49 AM   #12
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Yes.
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Old 02-20-07, 10:12 AM   #13
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Ok, last question before ordering one. Is this thing going to have water bottle mounts? Sorry, after the first 40 miles I get a little thirsty.

The 21st is tomorrow so here's to an end to this thread finally! I swear I will not look at it again once I order one. Really!
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