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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 08-06-08, 01:38 PM   #1
robsilverii
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IRO Mark V Order

I placed an order yesterday for a 56 cm Mark V and now I am wondering if I should of got the 59. I know there are countless threads on this but oh well. Here's the specs on my road bike that fits me great and the specs of the 56 and 59 cm IRO. I have no idea which one to get. The bike is going to be used for commuting so I want a comfortable fit but still maneuverable. Thanks for the opinions.

Current Bike - 56cm Trek 1500
Top Tube: 56.2cm
Seat Tube: 56cm
Stand Over: 31.1 in

56cm IRO
Top Tube: 55.5 cm
Seat Tube 52 cm (this is what scares me, is it only measured to the center of the top tube or to the top of the collar?)
Stand Over: 31 in

59cm IRO
Top Tube: 57cm
Seat Tube: 55cm
Stand Over 32 in

If anyone has measured their seat tube from the collar to them middle of the bottom bracket and could let me know that would be great.

Last edited by robsilverii; 08-06-08 at 01:59 PM.
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Old 08-06-08, 02:55 PM   #2
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just placed an order for a mark v 56cm as well!

yeh, their c-t sizing kind of threw me too. i called them and they put me on this size frame, though the conversation did feel kind of rushed and there was a bit of commotion in the background! oh well, the top tube measurement was perfect and going up to a 59 made me really nervous.

in the infinite posts on sizing iro frames someone had mentioned that they were actually smaller than their stated size (kind of the way the mercier's are sized...) but someone corrected the poster about them not being smaller but being...something, i can't remember.

anyway, i'm curious too.
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Old 08-06-08, 03:12 PM   #3
robsilverii
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I'm 5'10.5"... The more I'm thinking about it the more I think them 59 would work best but I really have no clue.
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Old 08-06-08, 03:17 PM   #4
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dunno. i'm 5'11", 32" and change inseam. there's a guy on here who is 5'9" 33" inseam or something and rides a 59 and loves it, there's also one who seems exactly my size and rides the 56 and loves it. who are you to believe. i just called iro to put my mind at ease...

still wondering about the c-t measurement though...
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Old 08-06-08, 03:30 PM   #5
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im 5'11'' with a 33'' inseam and rid a 59cm Soma Rush and almost got a 59cm Mark V but i got the Soma with much better parts for $400
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Old 08-06-08, 03:34 PM   #6
robsilverii
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I don't want a Soma Rush. Sorry.
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Old 08-06-08, 09:16 PM   #7
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im 5'11" with a 33" inseam. I use to have a 59cm Angus, and it was too big. I wished i would have gotten the next smaller size.
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Old 08-06-08, 10:09 PM   #8
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I'm 6'2" with a 35" inseam and went with a 59 cm Mark V. It fits me perfectly. The seat is jacked up by about 4-5 inches.
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Old 08-06-08, 11:51 PM   #9
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uhhmmm....exactly! see robsilverii, it's all relative. i don't know, i figure i'll just stress about it until it arrives and i actually get to see it! i, however, ordered mine from pricepoint and they were out of the 59 so i could not have purchased it anywhoo...
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Old 08-07-08, 12:12 AM   #10
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robsilverii, here's a comparison of my old 56 and new 59 group buys (certain it's the exact same geometry as the mark v). we're the same height, so this should give you a vague idea of the proportioning you'll encounter.


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Old 08-07-08, 12:50 AM   #11
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I'm just under 5'11" ~32 and I got the 59 Mark V. I ordered one larger because he told me they ran small but when I stand over it my balls are barely touching the bike. I had to shorten up the stem a little and sometimes I feel a little stretched sometimes but for the most part it's not bad. Oh and the ball touching issue really increased my track stand ability.
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Old 08-07-08, 07:36 AM   #12
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I guess as long at the Standover height is not too much than I should go with the 59
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Old 08-07-08, 07:42 AM   #13
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I'm just under 5'10" (177cm). just over 32 inch real cycling inseam. I spoke with Tony personally, and he put me on the 59cm. And it works beautifully. I think the sizing is essentially stated size minus 3cm to equal other bikes. So the 59cm is really like a 56cm. And this makes sense to me by feel. My 59cm IRO actually feels a bit smaller to me than my 57cm Look road racing bike. Geometry is a weird thing.
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Old 08-07-08, 07:44 AM   #14
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Quote:
Originally Posted by robsilverii View Post
I placed an order yesterday for a 56 cm Mark V and now I am wondering if I should of got the 59. I know there are countless threads on this but oh well. Here's the specs on my road bike that fits me great and the specs of the 56 and 59 cm IRO. I have no idea which one to get. The bike is going to be used for commuting so I want a comfortable fit but still maneuverable. Thanks for the opinions.

Current Bike - 56cm Trek 1500
Top Tube: 56.2cm
Seat Tube: 56cm
Stand Over: 31.1 in

56cm IRO
Top Tube: 55.5 cm
Seat Tube 52 cm (this is what scares me, is it only measured to the center of the top tube or to the top of the collar?)
Stand Over: 31 in

59cm IRO
Top Tube: 57cm
Seat Tube: 55cm
Stand Over 32 in

If anyone has measured their seat tube from the collar to them middle of the bottom bracket and could let me know that would be great.
I'm pretty sure that is 59cm. That's how they 'size' their frames (which is odd to me, but whatever). The top tube is 57cm, the seat tube center to center is 55cm.



You need to be on the 59cm. Call Tony for verification.

Last edited by gfrance; 08-07-08 at 07:48 AM.
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Old 08-07-08, 08:11 AM   #15
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Originally Posted by gfrance View Post
I think the sizing is essentially stated size minus 3cm to equal other bikes. So the 59cm is really like a 56cm.
+1
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Old 08-07-08, 08:55 AM   #16
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NewYorkMantle, do you mind measuring your standover height for me?
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Old 08-07-08, 11:52 AM   #17
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gfrance, like i said, i'm taller than you with probably a bit longer inseam and i was put on a 56 by tony...so, again, it's relative. plus, when doing my calculation for top-tube i was put somewhere between 55-55.4 so anything longer would seem have me stretched out over the top of the bike.

Last edited by this1time; 08-07-08 at 12:02 PM.
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Old 08-07-08, 01:06 PM   #18
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I'm 5'10 with a 32" inseam.

I tried both a 56 and a 58 in the Rob Roy, and although I know that sizing is different, that frame also has IRO's "compact geometry". I went with the 56, partially due to top tube junk clearance, and partially to have a tighter fit for riding in NYC traffic.
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Old 08-07-08, 02:36 PM   #19
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I really have no clue what to do. If I felt confident in the fact that the stand over on the 59 would not be too big I would call Tony have em switch me over to one.
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Old 08-07-08, 04:34 PM   #20
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have you called him? it somewhat put my mind at ease. fact is, you won't know until you ride it. and, quite frankly, if you're worried about stand over, i think you ordered the right one!

oh yeh, how long is your wait for this bike? the whole 3-4 week thing really bothered me...
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Old 08-08-08, 10:53 AM   #21
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I ordered by bike on July 30th and was notified that it had been shipped on August 7th. As of 11:39am on the 8th, the bike is sitting in Secaucus, NJ, less than an hour away. Unfortunately, it's not scheduled to arrive at my apartment until the 11th.

I think the quick turnaround had to do with the fact that I ordered a Mark V with a pretty standard build.
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Old 08-08-08, 11:05 AM   #22
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Quote:
Originally Posted by ryan. View Post
I'm 6'2" with a 35" inseam and went with a 59 cm Mark V. It fits me perfectly. The seat is jacked up by about 4-5 inches.

you don't by chance live in new york city and would be willing to let me take your bike for a spin around the block would you?

i'm 6'3" and 34" inseam and i'm about to pull the trigger on an IRO, but am a bit nervous about which size to get.

thanks,

eric
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Old 08-08-08, 11:14 AM   #23
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I'm 6' with a 33" inseam and I ride a 59 Mark V. I just measured the stand over height for you it was 33". However, my nuts are not sitting on the top tube when I'm standing on the ground, I got plenty of room. Maybe I don't know how to measure my inseam correctly
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Old 08-10-08, 11:12 AM   #24
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5'11 1/2 w/ 32.5"-33" cycling inseam. I got a 59 Mark V and had to swap it for a 56 Mark V. With the 170mm crank I needed to have the seat pretty much all the way down to avoid having my leg completely extended and stretched on the down stroke and when standing my balls rested on the top tube in regular shoes. The 56 works much better for me.

Last edited by stoprock; 08-10-08 at 11:16 AM.
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Old 08-10-08, 09:12 PM   #25
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Originally Posted by eric400 View Post
you don't by chance live in new york city and would be willing to let me take your bike for a spin around the block would you?

i'm 6'3" and 34" inseam and i'm about to pull the trigger on an IRO, but am a bit nervous about which size to get.

thanks,

eric
you can probably find somebody to help you out with this on a regional forum (fixed.gr i believe for nyc)
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