Question about GMC Denali Road Bike

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Can anyone tell me the size of a bottom bracket for a GMC Denali 22.5" road bike from Walmart. 68mm x ? bottom bracket

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6ya6ya
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Posted on Jan 02, 2017

kawawa
  • 119 Answers

SOURCE: GMC Denali road bike starts wailing

Bearings in themselves arent that expensive [at all] and you could probably spend $5 for a set of new ones, but if the bike has been wailing for a while, you might want to make sure the friction between the bad bearings and the inside walls of the hub and Cone, hasnt ruined the whole build. because if they have then buying an new hub [$20 - 50 depending on the quality] would be a better option. And if you know how to untie everything you could just run your fingers through to check for any uneveness or bumps, otherwise asking a bike repair guy to help could be a just as good option

Posted on Jun 20, 2009

dunnbiker
  • 8546 Answers

SOURCE: Denali GMC 700C Women's road bike wrong tires!!!

Can you explain why you think the tires are too big? Do they NOT fit the rims? What condition was this bike in when you bought it? If the brake pads line up with the rims then the wheels are correctly sized for the frame.

Posted on May 06, 2010

  • 1788 Answers

SOURCE: have a old american flyer

Go to a bike shop and let them measure your cranks. Do you have a one piece or three piece crank? Do you have metric wrenches? Bottom bracket tool? You have to know the answers to these things to get the right size bearings, if it is a one piece you more than likely have a #66 but without seeing it, who knows.

Posted on Oct 26, 2010

Coachphil
  • 347 Answers

SOURCE: Getting a clicking sound from

Yes, of course you can replace the bottom bracket.

First though you will want to make sure that the clicking noise is in-fact coming from the bottom bracket. Even though it sounds like it is coming from that area there are other things that can cause a clicking noise, such as the examples below.

Front derailleur cable end hitting the crank-arm is a common clicking noise.
Pedals can also cause a clicking noise that sounds like its the bottom bracket.
chain rubbing the front derailleur
chain has a kink in it.

The size of your bottom bracket is related to a few factors:
1 - thread pitch (your bike is english)
2 - Bottom bracket width (your bike is 68)
3 - Crank style and brand. This I do not know for your particular bike as you did not provide the year of the bicycle or brand of crank, and they change.

Taking off cranks and removing and installing a bottom bracket requires many bike specialty tools and is probably not the best project if you have never done this before or own the tools. It will be far less expensive to have your local bike shop replace the Bottom Bracket then to do it yourself. Plus they can tell you what size it needs and if the click is even coming from that part or not.

Posted on Dec 11, 2010

Coachphil
  • 347 Answers

SOURCE: bottom bracket need replaced. needs a

impossible to tell you without knowing the bike brand and model and year, although you have provided that 1999.

If you take into a bike shop, which is the usual place to purchase the parts you need, they will be able to tell you what size Bottom Bracket will fit your bike, also what options you will have for replacement cranks and bottom bracket. This could be a very complicated issue when replacing with parts that are 11-12 years newer, the shop will be best equipped to give you all your options.

Posted on Apr 07, 2011

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1 Answer

Bottom bracket size


Typical mountain bicycles are 73mm, though modern (in the last 5 or so years) some have been going to 68mm. You can measure the bottom bracket shell. That is the part of the frame where the bottom bracket is inside. Measure from edge to edge without including the cups of the bottom bracket itself.

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I'd advise you to consult a bike shop as there may some interactions between a given BB and a given crank that may result in chainline problems. If you work with them and they can't get the recommended parts to work they will have to make it right.

Why is your crank "very worm [sic] after little use"? Do you mean the chainrings (which are replaceable)?

There may be other things at work here that a shop might spot and resolve.

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impossible to tell you without knowing the bike brand and model and year, although you have provided that 1999.

If you take into a bike shop, which is the usual place to purchase the parts you need, they will be able to tell you what size Bottom Bracket will fit your bike, also what options you will have for replacement cranks and bottom bracket. This could be a very complicated issue when replacing with parts that are 11-12 years newer, the shop will be best equipped to give you all your options.

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Getting a clicking sound from the bottom bracket area. I have a Denali Pro. Can I replace the bottom bracket and what size


Yes, of course you can replace the bottom bracket.

First though you will want to make sure that the clicking noise is in-fact coming from the bottom bracket. Even though it sounds like it is coming from that area there are other things that can cause a clicking noise, such as the examples below.

Front derailleur cable end hitting the crank-arm is a common clicking noise.
Pedals can also cause a clicking noise that sounds like its the bottom bracket.
chain rubbing the front derailleur
chain has a kink in it.

The size of your bottom bracket is related to a few factors:
1 - thread pitch (your bike is english)
2 - Bottom bracket width (your bike is 68)
3 - Crank style and brand. This I do not know for your particular bike as you did not provide the year of the bicycle or brand of crank, and they change.

Taking off cranks and removing and installing a bottom bracket requires many bike specialty tools and is probably not the best project if you have never done this before or own the tools. It will be far less expensive to have your local bike shop replace the Bottom Bracket then to do it yourself. Plus they can tell you what size it needs and if the click is even coming from that part or not.

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Denali GMC 700C Women's road bike wrong tires!!!


Can you explain why you think the tires are too big? Do they NOT fit the rims? What condition was this bike in when you bought it? If the brake pads line up with the rims then the wheels are correctly sized for the frame.

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