2002 Giant AC-1 shock replacement

[denboy72]

Hi,
Am looking to replace the rear shock (rock shox pro deluxe 190x40 I think) on my 2002 Giant AC-1, any recommendations? Would also be interested in used parts as well thanks

 

[#GIANT BIKE TART]

Hi, I have a Giant AC Team which I've changed the shock to a Rock Shox Monarch 191mm x 51mm air spring and it works super smooth and lighter than the original coil shock too. Depending on which model they are very adjustable for air pressure and compression and rebound damping. I got lucky and found a barely use one for £80 but they are fairly pricey new. You could always just get the original shock serviced if it doesn't feel as good as it should as they are great when working properly.

 

[denboy72]

Hi, I have a Giant AC Team which I've changed the shock to a Rock Shox Monarch 191mm x 51mm air spring and it works super smooth and lighter than the original coil shock too. Depending on which model they are very adjustable for air pressure and compression and rebound damping. I got lucky and found a barely use one for £80 but they are fairly pricey new. You could always just get the original shock serviced if it doesn't feel as good as it should as they are great when working properly.

Funnily enough, I was looking at these very shocks! Since my AC-1 has adjustable rear travel, I would think fitting a shock with a longer stroke *should* be OK.
Found this on ebay, look OK?
https://www.ebay.co.uk/itm/Rockshox-monarch-plus-rc3-/313544284290?_trksid=p2349624.m46890.l49286

 

[toomanyframes]

That shock will not fit as it doesn’t have the eyelet for a bushing because it’s made for a Specialized something-or-another!!
Also could you post a picture of the chainstays from underneath your frame? I have the same frame and one of the stays seems more bent in than the other. Thanks

 

[denboy72]

That shock will not fit as it doesn’t have the eyelet for a bushing because it’s made for a Specialized something-or-another!!
Also could you post a picture of the chainstays from underneath your frame? I have the same frame and one of the stays seems more bent in than the other. Thanks

Well spotted on the mount points, I hadn't actually looked at the details of it at the time of posting. I can get pics of my frame when I get home from work later today. The search continues then!

 

[denboy72]

Flipped the bike upside down and took the back wheel off, here's your chainstay pic, let me know if you need any more

 

[toomanyframes]

Flipped the bike upside down and took the back wheel off, here's your chainstay pic, let me know if you need any more

That’s great! I’ll check it when I’m back home but it looks the same as mine with the bend in the stays.

 

[#GIANT BIKE TART]

The standard shock length and stroke is listed as 191mm x 51mm so no different if you change to a different shock with the same figures. The rear stays on some of the A.C. frames were asymmetrical and others had similar straight stays. They are prone to cracking through age and use around the welds on the strengthening stay between the chainstays. Look carefully and check over when clean and dry to make sure if it's cracked or not. Mine has a small crack but been keeping an eye on it and I don't ride it hard these days but I'm intending on getting the frame welded and strengthened soon before it gets worse.

 

[denboy72]

The standard shock length and stroke is listed as 191mm x 51mm so no different if you change to a different shock with the same figures. The rear stays on some of the A.C. frames were asymmetrical and others had similar straight stays. They are prone to cracking through age and use around the welds on the strengthening stay between the chainstays. Look carefully and check over when clean and dry to make sure if it's cracked or not. Mine has a small crack but been keeping an eye on it and I don't ride it hard these days but I'm intending on getting the frame welded and strengthened soon before it gets worse.

Thanks for the advice. I do plan to strip the bike one day and bead blast the frame when I do if I find any cracks or anything suspect I'll weld them up, reblast then paint it. Thanks

 

[denboy72]

Hi, I have a Giant AC Team which I've changed the shock to a Rock Shox Monarch 191mm x 51mm air spring and it works super smooth and lighter than the original coil shock too. Depending on which model they are very adjustable for air pressure and compression and rebound damping. I got lucky and found a barely use one for £80 but they are fairly pricey new. You could always just get the original shock serviced if it doesn't feel as good as it should as they are great when working properly.

Hi I know it's been a few years since I posted this the finally got around to doing something about this bike of managed to procure a 190 by 51 monarch r, where did you get the bush kit and spices to fit this monarch shock into the giant AC frame there's a big difference between the two especially at the top where the shock mounts between the two sided swing arm, any help appreciated