I'm looking to replace the bearing cartridges on a 10 year old threaded Shimano Ultegra Headset. I couldn't find the exact model and also couldn't find only replacement cartridges. Anyone know if the Shimano 600 headset has the same size bearing cartridges or if it's possible to purchase the cartridges seperately?
'''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
The model number is most likely HP-6500 as I believe it was the last model Ultegra headset Shimano made before pretty much abandoning headset manufacture. I have them on a couple of bikes and they are a super bargain and wonderfully durable and reliable. They were 80% of the quality of a Chris King at 30% of the cost.