I have a head YOUTEK speed 16x19 thats a 3/8th grip with a prince quickzorb overgrip. Tennis season is starting in my HS and I'm looking for a second racket in case I snap in the middle of a match. I want to buy the same racket on tennis warehouse but the only available grip is 1/2 and 5/8. Does anyone own this racket and felt any difference between these two sizes? 3/8 and 1/2? Also, yes, I did ask tennis warehouse when they were going to restock but no reply.
Yes you will feel the difference!
The Speed has been replaced with a new IG Speed, so they won't be restocking.
Above posters have given you the options. If you want exactly the same grip, you can buy the racquet from TW and then also look for a TK82 4-3/8 grip on the board and replace it yourself. It's not always easy to find, and it takes some skill, as this as this will be your 1st time. There are posts on how to do this.
Personally, I like identical grips on racquets.