Replace the crotch in a pair of pants - PEP BB textile.straw.repair.crotch

Looking at that first link, I come to the conclusion that one of the things I am doing wrong is letting the holes get far too big before mending them!  My patches generally occupy most of the seat of the trousers, a stitch in time could have saved 109!

I chose a pair of shorts instead of pants--it's the same work either way, and they used to be pants, so hopefully it's allowed. I'm a commuter cyclist, so the inevitable seat blow-out is an inevitable fate for a lot of my shorts. I do about 3,500-4,000k [2,175-2,485mi] per year on my push bike, so the fact that this pair lasted 3 years of serious abuse (and was originally a secondhand pair of skinny jeans in the first place), it's not done too badly for a modern garment--typically made of thinner, inferior fabric, but it is what is available. Even this commercial garment is thicker than "denim" that can be currently purchased at local fabric stores, which is just thin, blue cloth and not denim in any meaningful sense of the word.

I used a seam ripper, cotton thread, handsewing needle, and treadle sewing machine to do this mend. The patch material is from an older pair of worn-out cotton shorts. Because of the weakness in the fabric around the seat from excessive wear, I decided to replace the entire seat rather than doing a basic darn, as it just wouldn't last.

So since starting in on some textile BBs, learning to mend worn out clothes I've been doing a big pile of damaged jeans I had.  The question may be, why did I never throw out all these jeans since I was accumulating them for years?  I think it's because woven fabric is to me just such an obvious source of material wealth when I consider what it takes to make from scratch!  I couldn't see throwing away pants that just had a few holes or thin spots while most of the remaining fabric was good.  Turns out that thinking has finally paid off now that thanks to PEP I've set about learning how to do those repairs!

Since I started biking a lot more in the past few years I've found that it is now the crotch area of my jeans that wears out and rips open as fast or faster than the knees.  So a few of these jeans needed repair in this zone.  I approached this in much the same way as I was tackling torn knees.  One pair of especially worn jeans became the initial sacrifice source material.  I would carefully lay out the torn/worn pants to determine what shape I needed to cut for a patch, then cut the patch a bit larger all around.  Then I'd finish the edges by folding them over a bit and sewing them down.  Next I pinned the patch in place before carefully sewing all around the edge to attach it.  Then on the inside I'd stabilize the internal torn/frayed edges while at the same time anchoring them to the new patch.  To finish up I'd then sew a series of lines around the rest of the patched zone to further anchor the two pieces together.  I was using cotton thread of course.  I also did everything with hand sewing.  (I have yet to figure out what's wrong with my sewing machine to repair it.)

I submit this for consideration of this BB.