• ISCG uses tabs that are part of the frames bottom bracket shell to keep the chain guide or derailleur attached.  The holes on   center vertically are 47.7mm apart and the holes on center horizontally are 47.79mm apart.

• ISCG 05 uses tabs that are part of the frames bottom bracket to attach a chain guide or derailleur.  The bolt circle diameter for   ISCG 05 is now larger than the ISCG to allow for stronger mounting and a wider range of fit.  The holes on center vertically are   55.92mm apart and the holes on center horizontally are 55.92mm apart.

• BB or E-Type uses the bottom brackets flange on the drive side and a tab on the frame to keep the chain guide or derailleur   attached .

The information provided is related to the products we carry, any additional information should be inquired thru the manufacturer.

Tools: always use the right tool for the job; this will save you time and money in the long run.