# Singlespeed & Fixed Gear - info on geometry of group buy IRO

Bikeforums.net is a forum about nothing but bikes. Our community can help you find information about hard-to-find and localized information like bicycle tours, specialties like where in your area to have your recumbent bike serviced, or what are the best bicycle tires and seats for the activities you use your bike for.

View Full Version : info on geometry of group buy IRO

astrx
02-20-07, 07:38 AM
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

rknj
02-20-07, 07:51 AM
went to the IRO website which didnt say much.

I doubt it.

astrx
02-20-07, 07:54 AM
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?

polara426sh
02-20-07, 09:17 AM
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"

queerpunk
02-20-07, 09:29 AM
It has the same geometry as the Angus.

It has the same geometry as the Mark V.

polara426sh
02-20-07, 09:33 AM
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.

queerpunk
02-20-07, 09:41 AM
Which has the same geometry as the Angus.

Which has the same geometry as the Mark V.

br995
02-20-07, 09:43 AM
Yeah, but what's the geometry of the group frame like?

bonechilling
02-20-07, 09:46 AM
57cm in purple with 1 1/8" threaded!

polara426sh
02-20-07, 09:46 AM
Yeah, but what's the geometry of the group frame like?

Two triangles welded together.

br995
02-20-07, 09:48 AM
Two triangles welded together. It has that little thingy coming off it though! Does that mean mine's a boy?

polara426sh
02-20-07, 09:49 AM
Yes.

rystone
02-20-07, 10:12 AM
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!