I’m not even sure this product exists but maybe one of y’all has a source or some ideas?
tl;dr I’m in search of single speed sliding inserts that will give me 5mm-10mm more rearward room so I can run a wider tire on my bike
More details: The bike is a semi-custom version of this and is currently limited to 2.3” 29” tire because the chainstays are very short: https://www.sbccycles.com/kingdom-ti…n-vendetta-x2/
The bike has Paragon sliders and I’m hoping to find something similar to these (they add 15mm but are not sliding) https://www.rsdbikes.com/product-page/usd-mayor-al-ext-dropout-15
I called Paragon and they said they could make some but I’d need to order something like 800 pairs 
(I could run a 27.5” rear wheel but don’t like what it does to the geo/handling)
Any suggestions/leads would be very much appreciated!