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  • 8 speed MTB upgrade

     merry updated 4 months, 1 week ago 4 Members · 4 Posts
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  • teadunker

    2 July 2020 at 9:19 pm


    I’m new to the forum and I was hoping to get some advice on my planned upgrade.

    I have a 2008 Mongoose Otero Elite and after 10 years of ownership and never having been serviced, it’s time for some replacement parts!

    Firstly, I know that a lot of people will say save your money for a new bike but I’m happy with 80% of my bike and it’s just the wear and tear that needs attention. I don’t have the money to shell out thousands on a new bike and I like to save money by doing my own mechanical work.

    The bike was cheap but it has a strong (and heavy) frame. I have upgraded the fork, brakes, pedals, grips and added a dropper post. Now the gears are worn out and need to be replaced. Instead of replacing like for like I thought it would be a good time to upgrade.

    It’s currently an 8×3 set up and I’d like to upgrade to a single chainring with a 10 or 11 speed cassette. Is that possible? There’s a lot of kit out there and it’s difficult to know what’s compatible with what. Currently I need to replace the bottom bracket, crank/front chainrings, rear cassette, rear derailleur and free hub. I’ve priced it up and it looks like I could do the lot as like for like for around £150. As I’m doing the work myself I’m happy to increase my budget to £200+ for the upgrade.

    The bike currently has Shimano Alivio RD-M410 rear derailleur, CS-HG30-8I cassette, FC-M311 22/32/42 crankset and Alex TD-24, 32-hole wheels.

    I’m not in any way an extreme mountain biker so I’m looking at the budget end of the component market.

    I’d be grateful for any suggestions.


  • lynf67

    6 February 2021 at 11:41 am

    Hi same bike looking for similar system to what I have now. What have you achieved with your bike if you don’t mind sharing?

  • Gunner

    6 February 2021 at 6:57 pm

    In my opinion I think you would struggle to put anything wider than a 9 speed cassette, and that might be a push, on the rear, your axle won’t have enough space to take a wider cassette and your frame won’t be wide enough to take a larger axle. Given what you say about the weight of your bike as well, I’d be inclined to stick with the 3 x 8 set up and maybe just tinker with the sprocket sizes.

  • merry

    15 March 2021 at 12:22 am

    Hi, found this post, and forum after doing a search about changing the BB on the ontero elite. I haven’t don’t the bb as yet but I can confirm you can stick a 1×11 speed on the old thing as you can see in this pic, iirc it’s a sunrace 11-50 cassette and I’m running the shimano deore xt md8000 derailier on a goat tooth extender.

    Like you I don’t want need a new bike as this one is doing me just fine, and I enjoy doing the upgrades.

    I plan on getting a new frame when this one brakes and swapping the upgrades over

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