Dear Bike Forum Community,

I've had my road bike for 7 years now and determined it was time to overhaul my rear hub. Everything went well until it came time to unscrew the freewheel body fixing bolt as shown in the manual linked below. I hunted down the Allen socket bit after two hardware shop stops and went to work. Only, it didn't work. I might just take up unicycling because my 200lb self managed to balance on top of this thing while trying to unscrew it. I mean, this thing won't budge. My LBS sprayed some unscrewing compounds on it, we waited 30 minutes and still we could not get it to budge even with an extra long seat post stem being used for leverage.

Does anyone have any suggestions for how to unscrew the ununscrewable freewheel body fixing bolt? Inside there lies grinding grime... it's begging to come off!

Best regards,
John

Part manual: si.shimano.com/pdfs/dm/DM-HB0003-04-ENG.pdf