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  1. #1
    Junior Member Cobretti's Avatar
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    Left crank shot for Rali Rio mtb, need suggestions.

    Hi, I know this thread has been done a million times, as Ive been lurking and googling the subject many times, which all lead me to this forum.

    For starters I live in Panama (the country), and just a few days ago I bought a brand new Rali Rio mtb. I've really been enjoying the bike lately but today I was very upset when I found the left crank arm was loose and I had no other choice but to stop my commute.

    The bike has a 3 month warranty, which from Rali, a bicycle company Ive never heard of outside of this country. (I have no idea where this company is from?)

    What I fear is when I take it back to the bike shop and get said crank it repaired/replaced if it happens again. I feel I will have no choice but to buy a higher quality shimano crankset.

    Heres what I have no clue on and need to know, My mtb is a size 26" what crankset size do I need? do I have to buy the entire set with chain and cassete? Or just the crankset?

    I believe it's a 10 speed, I counted 7 sprockets on the rear and 3 on the front.

    This is the crankset I'm looking at, would it work/ fit on my mtb? and again what length/teeth should I get? I ask cause I am literally clueless.

    http://www.chainreactioncycles.com/u...t/rp-prod67200

    And I would obviously take the the crankset into the LBS and let them install it for me.

    Here is a picture of my bike, a 26" Rali Rio (bought a few days ago new)








    PS I am terribly sorry if I broke any rules in advance, I made this thread because I feel my situation is a bit unique in regards to the brand, and me being clueless.

  2. #2
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    Since it is a new bike you should take it back to the bike shop and have them make it right. A loose crank would indicate that the bike was not assembled correctly. If the crank has been ridden loose for an appreciable distance it may be damaged and require replacement. You should not have to do or buy anything besides return the bike to the shop. The shop's responsibility is not dependent upon the brand of bike nor where it is located.

  3. #3
    Junior Member Cobretti's Avatar
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    Quote Originally Posted by dsbrantjr View Post
    Since it is a new bike you should take it back to the bike shop and have them make it right. A loose crank would indicate that the bike was not assembled correctly. If the crank has been ridden loose for an appreciable distance it may be damaged and require replacement. You should not have to do or buy anything besides return the bike to the shop. The shop's responsibility is not dependent upon the brand of bike nor where it is located.
    Thanks, I will be taking it back this Monday. But all I want is the crank to be fixed, I don't want a replacement bike as I really like this one. (plus this was the only one in black they had) the crank I rode on loose unknowingly and after I stopped to pulled it off and inspect it I confirmed the crank was damaged beyond repair and will been needing replacement.

    Thing is, the bike only has a 3 month warranty, this happened 3 days within my purchase date. (I managed to put in abut 15 miles on it).

    My point is I feel like the cranks are a really cheap low build quality that is held together by a nut. And I dont want to go through with this again after it's been repaired/replaced with a factory crankset...thus my thoughts of buying a nice shimano crankset such as the one I linked.

    What should I do? I really want the crankset to be reliable, everything else on the bike is fine for my needs.

  4. #4
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    I meant that the crank arm might need replacement, not the bike. All cranks are "held together by a nut", that nut (or bolt) just needs to be tightened properly. Even the highest-quality components can fail if not installed correctly.

  5. #5
    Junior Member Cobretti's Avatar
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    Quote Originally Posted by dsbrantjr View Post
    I meant that the crank arm might need replacement, not the bike. All cranks are "held together by a nut", that nut (or bolt) just needs to be tightened properly. Even the highest-quality components can fail if not installed correctly.
    Even the higher end shimano cranksets as I linked use a nut to hold the crank in place? I thought that was one of the purposes of buying those cranksets. I was reading that the crankset I have on my bike is what is usually found on kids bicycles and lower end budget bikes. Is this true?

  6. #6
    Andrew R Stewart Andrew R Stewart's Avatar
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    If you don't want this to happen again then you need to learn how to take care of a bike yourself. It is VERY unlikely that there was anything wrong with the crank's manufacturing when the bike was sold. The most common reason for a crank arm (almost always the LH side) to come loose is from a lack of proper assembly tightening and a lack of follow up check/retightening. While the assembly is the shop's responsibility the follow up check and possible retightening of the retaining nut/bolt is the rider's responsibility. I do hope that the shop offered you a 30 (or 60 or 90) day service for free. Any new bike goes through a break in period and needs a number of retunings and retightenings in a number of areas. A properly assembled, tightened and maintained tapered square crank will last for thousands of miles. A poorly done one, no matter the grade or brand, will be problematic soon enough.

    Now to address another aspect of your posting that you haven't asked about. Your lack of understanding about your bike is sad. While not a reason for the bike to fall apart or a shop to not do their part of the job, your lack of basic knowledge certainly doesn't make things any better. Will you even know what the shop will do to correct the problem, even if they are honest and try to describe the repair to you? I STRONGLY recommend that you learn about your bike's design and features.

    Like how to count how many gear choices it has. There are any number of online and print (magazines) sources that can help you out with these basic understandings. As you get a better understanding of how your bike works, what features it has and how to maintain it you'll also get a feel for how to have the bike fit you the best it can.

    The photo you posted shows the brake levers are extending from the handlebars pretty much horizontal. The usual is to have them positioned so they are in line with your arm and shoulders when riding. This way your fingers can rest on the brake lever blade without cocking your wrists up. Also I'd love to have a photo of you on your bike and pedaling. I wonder about the seat height and your leg extension.

    Lastly, did the shop provide you with an owner's manual or explain the use of your wheel's quick release levers? Andy.

  7. #7
    Junior Member Cobretti's Avatar
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    Basically, no. As I said I'm not an expert on bicycles. Thus the reason I came on here asking for help. I tried and tried looking up information on this model, try for yourself google comes up with nothing but local sale ads. The company doesn't have an official wiki page, and the only website is a sales page from the country. The picture was taken right after I had it "adjusted" from buying it off the rack. and no, no manual nothing. just the receipt and warranty information.

    The size is fine for my height, I'm 5'11. But weight my be an other issue as I weigh 300lbs. I use this bicycle as my commute/transport around town. Im not a pro cyclist, nor do I consider myself one, infact most of the words and lingo such as "cassete" "bb" etc.. I picked up from reading while I was lurking around on said related threads. This is my first adult mtb, last time I rode a mtb I was a child.

    And no, no one explained anything to me. Sorry I lack the knowledge and intellect you mention. As this is something new and fresh for me.
    Last edited by Cobretti; 01-18-14 at 11:01 PM.

  8. #8
    Senior Member Thumpic's Avatar
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    Quote Originally Posted by Cobretti View Post
    Basically, no. As I said I'm not an expert on bicycles. Thus the reason I came on here asking for help. I tried and tried looking up information on this model, try for yourself google comes up with nothing but local sale ads. The company doesn't have an official wiki page, and the only website is a sales page from the country. The picture was taken right after I had it "adjusted" from buying it off the rack. and no, no manual nothing. just the receipt and warranty information.

    The size is fine for my height, I'm 5'11. But weight my be an other issue as I weigh 300lbs. I use this bicycle as my commute/transport around town. Im not a pro cyclist, nor do I consider myself one, infact most of the words and lingo such as "cassete" "bb" etc.. I picked up from reading while I was lurking around on said related threads. This is my first adult mtb, last time I rode a mtb I was a child.

    And no, no one explained anything to me. Sorry I lack the knowledge and intellect you mention. As this is something new and fresh for me.
    Don't get frustrated. I don't think any ill will was intended although the previous post was rather harsh. Some folks just want to ride a bike. You don't need to be an expert or all knowing. You will need a decent shop though. It sounds like you don't have one yet. Do some research on YouTube, Park Tools and the Sheldon Brown websites and you will gain plenty of basic knowledge.

    You had a bolt or nut that came loose and caused crank damage. That's all. No biggie. The bike shop should fix this fairly easily, probably with parts they have on hand and it shouldn't cost you anything.
    Last edited by Thumpic; 01-19-14 at 10:10 AM.
    Thumpic....

    Green is the new "CHEAP"

  9. #9
    Andrew R Stewart Andrew R Stewart's Avatar
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    Quote Originally Posted by Cobretti View Post
    Basically, no. As I said I'm not an expert on bicycles. Thus the reason I came on here asking for help. I tried and tried looking up information on this model, try for yourself google comes up with nothing but local sale ads. The company doesn't have an official wiki page, and the only website is a sales page from the country. The picture was taken right after I had it "adjusted" from buying it off the rack. and no, no manual nothing. just the receipt and warranty information.

    The size is fine for my height, I'm 5'11. But weight my be an other issue as I weigh 300lbs. I use this bicycle as my commute/transport around town. I'm not a pro cyclist, nor do I consider myself one, infact most of the words and lingo such as "cassete" "bb" etc.. I picked up from reading while I was lurking around on said related threads. This is my first adult mtb, last time I rode a mtb I was a child.

    And no, no one explained anything to me. Sorry I lack the knowledge and intellect you mention. As this is something new and fresh for me.

    While my reply may have seemed harsh to you it is intended to be advice that you would do well to follow. The brand of the bike has no other intention to spread the word except that which will sell the bike. So no surprise that you don't find any info beyond ads. But there are many hundreds of articals and forum postings that describe your bike's parts and construction. These are created by people whose intent is to teach and explain. Sometimes i am one of them. Today i am not and my comments were to open your eyes up to the chance that there is such info for the taking.

    As long as you chose to remain uneducated about what ever you surround yourself with (be it a bike or sex or food...) you will subject to the results of your actions without knowing the whys. Like the smoker who develops a cancer and can't figure out why they got it. (And if this was here in the self centered USA- who can I sue because no one told me smoking would lead to cancer).

    So I did use strong words to try to convince you that there is a world of understanding out there. Here in the USA we sometimes call this "tough love".

    My continuing onto how your bike is set up is where i did choose to teach you. Sorry if that part of my reply got lost in your reaction. The comments about the shop's chance to educate you about the wheel retention and/or an owner's manual are real issues that you should deal with. While the crank arm coming loose and falling off is a shame, it is not a safety issue directly. But if the same had happened to your front wheel your health would have been challenged on the spot. Here in the USA we require shops to deliver said manual and make sure the rider understands (there's that word again) how to remove and resecure the front wheel if it has a quick release. That your shop did neither is pretty poor.

    You now have some information that you might not have had just a few days ago. What you do with it is up to you. But the prudent rider would go back to the shop and ask about the function of their bike. If that shop can't or won't help you then you still should have the knowledge and should search it out elsewhere.

    Your size only increases the stress on the bike and increases the likelihood of wear and failures. So the upkeep of the bike should be done to a greater amount then your 100lb friend.

    Again I'm sorry if I sound hard but if i can help you avoid falling on your head and suffering a life altering injury then i am at peace with my style. Andy.

  10. #10
    Senior Member Thumpic's Avatar
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    Jeezlouise....it's just a damaged crank on new bike! The OPs issue was clearly and concisely answered in the first reply. He asked for suggestions, not a diatribe on his approach to life. He turns to a normally helpful forum and instead of informative comments from us; he gets crap from you about things that are none of your business (sex and food?) Chill out and try to be constructive........
    Thumpic....

    Green is the new "CHEAP"

  11. #11
    Andrew R Stewart Andrew R Stewart's Avatar
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    I usually limit my replies to three so here's the last one.

    Yes I could have just spoke to the narrow question that the OP first asked. But he did open the door to his "cluelessness" and suggested his wish to understand further. I figured others would answer his questions about cranks (and some have done so). But I am trained to anticipate my customer's needs, to educate my customers about their bikes and how to get the most out of them, how to care and feed the bike and how to learn more as they are motivated to do so.

    I use metaphors frequently because I find that many won't really listen to what is said unless you put it in a frame of reference they already accept as important. Hence my reference to food or sex. I think we all can agree that the consequence of unprotected sex can be pretty bad. well i think the riding of a bike with an unknown securing of the front wheel is also potentially pretty bad. That i got a reaction from the reading public just proves to me that my method hit home.

    Like I said before. I can live with my statements and intent. I hope at least one rider who reads this sees the need to understand how their bike works and becomes a safer and more complete rider. Now I'm out of this thread. Happy trails. Andy.

  12. #12
    coprolite fietsbob's Avatar
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    Square taper left crank arms , pretty much if the length is the same (170. 175, etc)
    then you can take what you can find and use it.


    Bikes in shops, where I have worked..

    have a year coverage on the component parts.

    (FWIW, 90+% of bikes these days are made in either of the 2 Chinas PRC or ROC)
    [... though some are going to Thailand And Cambodia]
    Last edited by fietsbob; 01-19-14 at 12:08 PM.

  13. #13
    Senior Member Thumpic's Avatar
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    Quote Originally Posted by Andrew R Stewart View Post
    I usually limit my replies to three so here's the last one.........
    Thank God for small favors; your arrogance and condescension are nauseating.

    OP.....good luck with your bike.
    Thumpic....

    Green is the new "CHEAP"

  14. #14
    Junior Member Cobretti's Avatar
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    Quote Originally Posted by fietsbob View Post
    Square taper left crank arms , pretty much if the length is the same (170. 175, etc)
    then you can take what you can find and use it.


    Bikes in shops, where I have worked..

    have a year coverage on the component parts.

    (FWIW, 90+% of bikes these days are made in either of the 2 Chinas PRC or ROC)
    [... though some are going to Thailand And Cambodia]
    Pretty much the only useful reply with some solid info. No one else answered my question about the shimano cranksets and if they would work on my bike and what size would I need, thanks Thumpic for standing up for me. But I'll go ahead and call it out here right now, Andrew R Stewart is a straight up DICK. Insulting my intelligence when the schmuck has no clue who I am, or maybe because I posted that I am in a third world country? Well for one I am expat from the U.S. living here, and bicycles isn't what I studied in college, as for my personal life I'm not wasting anymore time explaining about myself as there is no need to.

    This is usually why I don't join forums, there's a always a bridge with a troll underneath.

    In the end I got no real valuable info regarding what I wanted to know about. And will resort to asking the shop keeper. So yeah, this will most likely be my last post in this forum, as I've come to learn it's nothing but a joke.
    Last edited by Cobretti; 01-19-14 at 01:10 PM.

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