Okay, so I know a million people must be running these, and I must be doing something wrong. Maybe y'all can tell me what it is.
I have an ISCG 05 DRS and a 73mm BB Nomad. I am having serious issues.
I do have the 5mm plastic spindle spacer on the driveside arm. I have 2 x 2.5mm BB spacers installed on the driveside, outside of the 2.5mm wide ISCG05-BB mount adapter. The BB adapter is installed concave side inboard so as to bring the DRS as close to the bike as possible. With this setup, I finally got everything to line up right (with only one wear plate installed). But now that it's all lined up, the thread purchase for the driveside BB is dismal (5mm less than it was, maybe not even 10mm now!). More importantly, there is now so much junk spacing it all out that I can't even get the preload nut to fit into the threads on the non-driveside through the crankarm. So clearly, I am not allowed to run those extra 5mm of spacers. But if I take 5mm of spacers off the BB on the driveside, the inner chainring bolts will contact the guide - actually, as it is, there's about 1mm of clearance with the 5mm of spacers installed, and if I remove them, there will be a 4mm gap where the crankset isn't inserted into the BB enough (4-5mm of spindle exposed between the plastic spacer and the BB cup). Adding another 5mm spindle spacer would only do the same thing that those 2 2.5mm BB spacers are doing - I would still be too short on the non-driveside to get thread purchase.
So I've concluded that I need a BB mount DRS. Here's why:
After all the fancy spacing that I've done, the end result is that the DRS backplate is exactly where I want it in relation to the inner chainring bolts (about 1mm away). Now, if this giant hole for ISCG05 was a BB mount hole instead, I could get rid of the 2 2.5mm spacers, move everything inboard by 5mm, and be set to go. The ISCG 05 to BB adapter that I have does not make this possible as it's made to space things outboard, not inboard. It doesn't work if you mount it on the other side of the backplate.
So I guess my question is: are all you Nomad riders with DRS' running the BB mount backplate? Or is there something I'm doing wrong?
Thanks in advance.
I have an ISCG 05 DRS and a 73mm BB Nomad. I am having serious issues.
I do have the 5mm plastic spindle spacer on the driveside arm. I have 2 x 2.5mm BB spacers installed on the driveside, outside of the 2.5mm wide ISCG05-BB mount adapter. The BB adapter is installed concave side inboard so as to bring the DRS as close to the bike as possible. With this setup, I finally got everything to line up right (with only one wear plate installed). But now that it's all lined up, the thread purchase for the driveside BB is dismal (5mm less than it was, maybe not even 10mm now!). More importantly, there is now so much junk spacing it all out that I can't even get the preload nut to fit into the threads on the non-driveside through the crankarm. So clearly, I am not allowed to run those extra 5mm of spacers. But if I take 5mm of spacers off the BB on the driveside, the inner chainring bolts will contact the guide - actually, as it is, there's about 1mm of clearance with the 5mm of spacers installed, and if I remove them, there will be a 4mm gap where the crankset isn't inserted into the BB enough (4-5mm of spindle exposed between the plastic spacer and the BB cup). Adding another 5mm spindle spacer would only do the same thing that those 2 2.5mm BB spacers are doing - I would still be too short on the non-driveside to get thread purchase.
So I've concluded that I need a BB mount DRS. Here's why:
After all the fancy spacing that I've done, the end result is that the DRS backplate is exactly where I want it in relation to the inner chainring bolts (about 1mm away). Now, if this giant hole for ISCG05 was a BB mount hole instead, I could get rid of the 2 2.5mm spacers, move everything inboard by 5mm, and be set to go. The ISCG 05 to BB adapter that I have does not make this possible as it's made to space things outboard, not inboard. It doesn't work if you mount it on the other side of the backplate.
So I guess my question is: are all you Nomad riders with DRS' running the BB mount backplate? Or is there something I'm doing wrong?
Thanks in advance.