Hello John! This bag has gone through revisions on its design and the handle problems seem to have been fixed!

Yes, this 4 ball roller will offer Large 5" x 2" Smooth KRuze wheels and a wider base for a more sturdy bag

It will fit up to a size 15 in mens. You could put two small pairs in the shoe compartment most likely.

Yes, this will have a locking handle.

Unfortunately, it does not.

With added balls it will be around 61#, without balls it will be half that.

Yes, it does retract.

Yes, it if you click on the link that follows it will direct you to the black/carbon color. https://www.bowling.com/products/hammer-premium-4-ball-roller-black-carbon.htm

This bag will weigh about 15lbs when empty.

Unfortunately, we do not sell replacement wheels, but you can reach out to Hammer and they can send you a replacement wheel!

There will be two large 5" x 2" Smooth KRuze wheels.

Unfortunately we do not have a Hammer 6 ball roller at this time. Here is a link to view our 6 ball rollers: https://www.bowling.com/shopping/all/bowling-bags/6-ball-rollers

We do not sell a replacement handle for this but Hammer may have a handle kit if you needed to get the handle replaced or repaired. They can sometimes help with this under a warranty so you could check with the company you purchased from to try and get this covered under warranty.

You may contact the manufacturer for parts for this bag.

This bag offers an internal positive lockable extension hand!le