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BlesUp
Got the IO frame today.
I said above it was listed as 20", well it was actually listed as 20.5". I did get a bit worried when I opened the parcel and found a manual for a 17.5" Genesis IOID but it all worked out in the end, it seems Genesis measure centre to centre so the 20.5" is to the top of the seat tube and it'll be an improvement upon the FireEye but not too large.
My steerer also fits just minus 1 of the 2 spacers I was running on the FireEye.
I was a bit worried about the a2c length of the fork, I looked at the IOID spec before buying the frame and saw that the bike originally came with a suspension fork but I bought the Krampus fork to replace a 150mm travel fork and I didn't think the fork on the IOID would have had anything like that much travel.
After fitting half the headset, forks and wheels to the IOID I did get a bit worried by the negative bb drop but, overlaying images of the 2 shows the angles to be very similar. It should be noted that in the photos below, the IOID only has a bottom half of a headset fitted so the fork is sitting a bit slacker than it does now it's fully built.
The seattube angles are pretty much identical.
The bb is a bit higher on the Genesis but I've clipped pedals on rocks a few times with the FireEye so I think I'll be glad of that.