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HELP! Fox compression tune F for a 140lb rider

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SQUIRRELSHOOTR

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Discussion starter · #1 ·
So I'm in need of a rear shock. A guy I know has a fox 6.5x1.5 CTD float that he would sell me if I want it. It has compression tune f on it. I have no idea what that means. I currently ride a 2011 Scott Spark 60 with a DT Swiss M210 shock. I am just wanting to know that this is going to work well with my bike and weight and not be a huge waste of money.
Any help would be appreciated. I have tried contacting Fox but it has been over a week since i emailed them.
 
#2 ·
The compression tune is pre-set to fast; i.e. the shock will compress at a faster rate than the Medium tune which is Fox's standard compression tune setting... Since I don't have any hard numbers that I can throw out there I know that I'm not helping much but I would think that it would be a good call.

Question: what is wrong with the old shock? Is it repairable or are you just tired of riding it and looking for something different?
 
#8 ·
Just realized he posted his weight in the title. I don't know man, I would be hesitant to go with a firm tune for a feather weight. Good chance it will ride pretty harsh. Will the guy let you try before you buy? Its pretty easy to change the tune since its a firm. Would just need to remove a few shims. Got any buddies that can work on shocks? I can tell you which shims to remove.
 
Discussion starter · #9 ·
I think I could probably manage on removing a few shims. There's probably some youtube videos if I needed help on anything. I rebuilt a fork awhile back. I would have to buy the spacer kit from fox to get it to fit in my frame. My current shock isn't worth rebuilding. When it was new it still felt "sticky". All the bikes I have ridden with fox floats have felt super smooth and plush. Time to upgrade.

Edit
It's not a boost valve.

The DT Swiss still had a lot if pedal bob even at my weight with more air pressure in the shock. I'm starting to think this firm tune could really help with the pedal bob. I think I'm gonna go ahead and get it. If I need to take out some shims I can deal with it when I get to it.
 
Discussion starter · #10 ·
I decided I'm gonna hold off for a week or so and just look at other shock options. I came across a pro pedal rp23 with boost valve and adaptive logic (with kashima coating!) on eBay. To me, it seems like I would have 6 on the fly options with that shock compared to 3 options on a ctd. As far as I know, pro pedal helps pedal bob. One I'm looking at has a boost valve of 150. I don't think a difference between 150 and 175 would matter because of my weight. It does have a medium rebound tune and a low velocity tune. Would this be better for my weight and bike than the ctd?
 
#11 ·
SQUIRRELSHOOTR said:
I decided I'm gonna hold off for a week or so and just look at other shock options. I came across a pro pedal rp23 with boost valve and adaptive logic (with kashima coating!) on eBay. To me, it seems like I would have 6 on the fly options with that shock compared to 3 options on a ctd. As far as I know, pro pedal helps pedal bob. One I'm looking at has a boost valve of 150. I don't think a difference between 150 and 175 would matter because of my weight. It does have a medium rebound tune and a low velocity tune. Would this be better for my weight and bike than the ctd?
Click to expand...
Bike manufactures spec bike w/ specific shock tunes (Fox / Rockshox) based on leverage ratio & suspension design. I had a bike that was spec'd w/ an "off the shelf" Manitou shock that I planned on swapping to a Fox Float. Called Fox for a specific tune recommendation and was told I would have to choose a shock based on my personal preference since the bike was not originally spec'd w/ a Fox . So I would have to factor the leverage ratio, my weight, riding style and general feeling of the original shock's behavior...or purchase any tune and send it in for a Custom tune. I chose a firm compression tune and 225 BV as my bike has a high leverage ratio and above average rider weight.
 
Discussion starter · #12 ·
Is there anyway to compare a fox shock to my current dt Swiss m210 spec wise, or is the m210 just a "generic" tune? I want something similar, just better. It's an ok shock..just too soft and feels sticky and isn't worth rebuilding IMO.
 
#13 ·
SQUIRRELSHOOTR said:
I think I could probably manage on removing a few shims. There's probably some youtube videos if I needed help on anything. I rebuilt a fork awhile back.
Click to expand...
I wouldn't make that assumption. Working on shocks is a whole new ball game. I doubt you will find anything on youtube on rebuilding a fox shock damper. You will need a fill needle and a 400psi source for compressed air or nitrogen.
SQUIRRELSHOOTR said:
I came across a pro pedal rp23 with boost valve and adaptive logic (with kashima coating!) on eBay. To me, it seems like I would have 6 on the fly options with that shock compared to 3 options on a ctd. As far as I know, pro pedal helps pedal bob. One I'm looking at has a boost valve of 150. I don't think a difference between 150 and 175 would matter because of my weight. It does have a medium rebound tune and a low velocity tune. Would this be better for my weight and bike than the ctd?
Click to expand...
With you RP23, I wouldn't say you will have 6 on the fly options. It's really just two. There are also different ProPedal tunes which you won't find labeled on the shock. Boost Valve tune is simply the IFP pressure setting. It makes a big difference in how the shock rides as increased pressure equals more platform damping, spring rate, and bottoming resistance. In short, increasing pressure makes it ride stiffer and use less travel. Its hard to say how it will ride on your frame, but 150 is on the low side and 25psi makes a fairly noticeable difference in how it rides. The good news is that its very easy to tune IFP with a 30$ fill needle, a good shock pump, and some oring cord. Will your buddy with the CTD let you try the shock first?
 
Discussion starter · #14 ·
I had no idea removing a couple shims would require that but I guess you're right if I'm taking it all apart and letting everything out. Man this is confusing. Why can't it be simple?

Fox needs some type of calculator on their website

Enter the following info and then it suggests several tunes with different feels.
 
#15 ·
Well, even the frame manufacturers don't always get it right. Then you throw in rider preference, size, and shape, and that's why we have places like Push Industries.

Chances are, anything you get will be a step up in performance. I would also seriously consider a Rockshox Monarch RT3, and would actually prefer it over a fox. Look for a low comp tune if you want a plusher ride or a med tune if you want a firmer ride. You will probably find a better deal on a Monarch. They are also easier to revalve.
 
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