Hey all, recently had the fortune (or misfortune depending on your opinion 
) to pluck an old Emmelle Xerama out of a dumpster with the intentions of just parts bin upgrading it, and I have a few questions regarding changing out some of the components to be more modern.
It came with a 5 speed freewheel/SIS drivetrain with an RD-TY20 on the back. By my research the TY20 dates to 89/90 which seems pretty in line with everything else that was on it. I have enough spares to cobble together a 1x8 drivetrain on it but if it fits is the question; I measured the dropouts expecting it to be 125mm as per Sheldon's articles, but it's came in at 128mm. From some further research it seems some manufacturers were doing 128mm dropouts late 80s early 90s to accommodate either 126mm or 130mm hubs, I do not currently have a wheelset and 8 speed rim brake wheels are a dime a dozen on fb marketplace/ebay/etc but they'll be 135mm hubs. How bad of an idea would it be to drop in a 135mm wheel, in terms of gear alignment/chainline/etc? I have read up on cold setting/spreading and trawled various forum posts with results ranging across the spectrum from "get it professionally done" to "just throw it in" - at the end of the day it's a low effort free bike with so I'm bordering on the latter but I figured I'd ask others opinions first.
Second question would be fitting a derailleur, as the TY20 is a claw mount. From what I can tell I just need a claw hanger adapter like this (https://www.rearmechhanger.com/product/rear-gear-mech-derailleur-hanger-cc103/) unless I'm missing something. Picture of the dropout area below (and one of the frame for prosperity), any advice/pointers are appreciated
) to pluck an old Emmelle Xerama out of a dumpster with the intentions of just parts bin upgrading it, and I have a few questions regarding changing out some of the components to be more modern.It came with a 5 speed freewheel/SIS drivetrain with an RD-TY20 on the back. By my research the TY20 dates to 89/90 which seems pretty in line with everything else that was on it. I have enough spares to cobble together a 1x8 drivetrain on it but if it fits is the question; I measured the dropouts expecting it to be 125mm as per Sheldon's articles, but it's came in at 128mm. From some further research it seems some manufacturers were doing 128mm dropouts late 80s early 90s to accommodate either 126mm or 130mm hubs, I do not currently have a wheelset and 8 speed rim brake wheels are a dime a dozen on fb marketplace/ebay/etc but they'll be 135mm hubs. How bad of an idea would it be to drop in a 135mm wheel, in terms of gear alignment/chainline/etc? I have read up on cold setting/spreading and trawled various forum posts with results ranging across the spectrum from "get it professionally done" to "just throw it in" - at the end of the day it's a low effort free bike with so I'm bordering on the latter but I figured I'd ask others opinions first.
Second question would be fitting a derailleur, as the TY20 is a claw mount. From what I can tell I just need a claw hanger adapter like this (https://www.rearmechhanger.com/product/rear-gear-mech-derailleur-hanger-cc103/) unless I'm missing something. Picture of the dropout area below (and one of the frame for prosperity), any advice/pointers are appreciated
