I have a couple of issues I could do with some answers, I hope you don't mind me asking all in one go.

I have a Carrera 29er that came with Suntour XCM30 Forks, the store that sold it has the specifications listed as :

Adjustable - NO Lockout - NO

After looking on the Suntour website I found what I think are the ones in question but they list them as :

Adjustable - Yes Lockout - Yes

Suntour Website XCM

So to keep this from getting too long :

  1. Are my forks adjustable?
  2. Can they be locked out?
  3. If so, can it be done with a basic toolkit?

Attached pics of my front end and the spec sheet from the store the bike came from.

Image 1 Image 2 Image 3 Image 4 Image 5

  • If I can see a shot of image 5 in better light I think I can answer your question. Also a shot of the other fork station from the top. I am interested in the (caps) for lack of a better word. On top of the forks. That's what will tell you if they are L O or not.
    – David
    May 10, 2019 at 20:49
  • I am guessing these are hydraulic sprung forks? Not air sprung forks? Just to save me searching the spec.
    – David
    May 10, 2019 at 20:51
  • From what specs I can find, I believe they're hydraulic sprung.
    – Dan K
    May 10, 2019 at 21:15
  • @david I will take some more shots tomorrow in better light
    – Dan K
    May 10, 2019 at 21:15
  • OK so most likely they are none adjustable but possibly lock out I would need to see the top caps on the forks both sides please.
    – David
    May 10, 2019 at 21:18

2 Answers 2


After experimenting this morning it turns out they have preload but no lockout.

I will experiment with the preload over the next few days.

This question can be probably be closed now.

Thanks for the assistance in the comments.


These are a spring fork (not such thing as a hydralic sprung fork as discussed in the comments).

Essentially forks fit into two categories - spring is air is a spring. These days the spring is almost always in the left side stanchion. Control of movement - rebound, damping and locking out is provided by hydraulic systems of varying complexity, most commonly in the right side stanchion

With your fork, the right side fork cap (last photo) appears labled 'preload'. This is a very basic adjustment - screwing down the preload tightens the spring making the suspension less compliant. In basic fork like this you do not tend to have any control of rebound or damping. You may have a lockout level/dial on the top of the left stanchion. Often the lockout is an optional feature - and sometimes able to be retrofitted (if you can find the parts)

  • If it has oil or fluid inside it that's hydraulic.
    – David
    May 10, 2019 at 22:01
  • It relies on fluid and a spring to create damping pressure or you would be riding round on just springs. Nice bouncy ride.
    – David
    May 10, 2019 at 22:02
  • Although I do generally agree with the most part of your answer.
    – David
    May 10, 2019 at 22:02
  • @mattnz this doesn't really answer my question or questions at all. Your essentially saying I may have something.
    – Dan K
    May 11, 2019 at 5:10
  • I cannot tell you if you have lockout, have a look and see if there is a dial on the right. You do have adjustment via the preload.
    – mattnz
    May 11, 2019 at 9:46

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