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IRO confusion

Old 12-28-10, 01:18 AM
  #1  
arp415
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IRO confusion

I was under the impression that the angus had more track geometry, while the mark v had more relaxed geometry. On the website, at least is 53 size, i see no difference. I ask because the bargain bin has a 53 mark v for 399, which seems to be a pretty good deal. I realize the plain angus is 4130, but does that mean the only difference between the markv pro and the angus is the color? Where does the .35 lb weight difference come from? (no that it matters)

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Old 12-28-10, 01:29 AM
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The current line of IRO frames (aside from Phoenix) have the identical geometries, the differences lie within the fork+frame material, fork offset and head tube size. Mark V and Mark V Pro have the same geometries but the Pro features a 30mm rake fork and Reynolds 631 tubing with no rear brake hole, whereas the regular Mark V is made of heat treated 4130 with 1 1/8" head tube and uses 43mm fork. The Angus has 1" head tube and uses the same tubing as Mark V Pro with 43mm fork.

I think you should get the 53cm Mark V if it fits you.

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Old 12-28-10, 01:41 AM
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I have an IRO, I'm not too fond of the geometry. At 53cm, the head tubes are really short for the top tube length, and they handle poorly. It was suggested I try a fork with a shorter axle to crown length and 30mm offset for my Angus. Does the fork of the Mark V Pro correct these issues? My suspicion is that they made the top tube and fork offset long to reduce toe overlap.
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Old 12-28-10, 04:21 AM
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Well the mark v in 53 is the only one for 399 that would fit me. If I had enough for the mark v pro i am fairly certain i would just save up some more for a wabi

Can i assume the iro mark v for 399 would be better than a kilo?

Last edited by arp415; 12-28-10 at 04:46 AM.
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Old 12-28-10, 01:06 PM
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Originally Posted by arp415 View Post
Well the mark v in 53 is the only one for 399 that would fit me. If I had enough for the mark v pro i am fairly certain i would just save up some more for a wabi

Can i assume the iro mark v for 399 would be better than a kilo?
I have a mark v and sold my kilo s3x, which im pretty sure shares identical geometry with the kilo tt.

I prefer my mark v over the kilo. But the choice is really up to you, if you prefer a more relax geo go for the mark v. If you prefer a more tight/track geo go for the kilo.
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Old 12-28-10, 06:36 PM
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Go for the IRO.

I love my Mark V, but I'm an old guy with a 62cm frame. The handlebars are lower on this bike (compared to the saddle) than my other bikes. For $399 I would buy the Mark V in a heartbeat.
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Old 12-28-10, 09:09 PM
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also worth mentioning... i believe IRO sizes run small.
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Old 12-29-10, 02:20 AM
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Originally Posted by klaw091 View Post
also worth mentioning... i believe IRO sizes run small.
Rather, they are measured by top tube, not seat tube.
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