[AllSkinnedUp]

I have and '04 CoilEX and when I stand on the pedals for hill climbing, the chain starts rubbing the frontderailer and if I really try to get some power, it pops the chain off. I have tried adjusting this thing every way I know how. I think the Crankset and Bottom Bracket are just flimsy.

I want to buy a set and since I never have, I am looking at a Raceface Bottom Bracket and a Raceface Crankset. The pictures I see look like the Crankset comes with Front Chain Rings and a bottom bracket. Before I head to the local bike shop Monday, anyone had to replace theirs? What are the list of parts I need?

Thanks in advance.

Jerry

 

[BlueSid]

Save your cash and upgrade the complete bike. The Coil EX is a good bike for what it is but it is not up to a lot of offroad abuse, which is why it is a $450+/- bike, the shop you bought it from should have set you up with a bike that was up to your riding style when you purchased the bike. The crankset and BB is not your problem, you either have bent chainrings or bottom bracket spindle, a bent tooth or two on your small chainring, bad adjustment, bad chainline or a mix of a few of these. Replacing the crankset, bottom bracket will probably set you back at least $ 250-$300, so you should find a good shop with knowledgable mechanics and let them look at it before you spend 2/3 of the bikes price on a part that doesn't fix the problem. Find a good DB shop, that way they can get some tech support from Diamondback if they need to. Call Diamondback directly if you cannot find a good local shop, they can point you in the right direction..

 

[AllSkinnedUp]

I hear you. I already have a KONA and I am thinking of buying a Gary Fisher Sugar 4+. They have them on sale for $750 at Brian Head Ski Resort in Utah. I have to say though, the CoilEX has been great for staying in shape riding. I originally bought a SS and they recalled it because the BB was cracking. That is how I ended up with the Coil.

You would think they would put a decent crankset in it though. I never had one that flexes like this one does. I think I will spend a few bucks on a crankset anyway. Stock as it is I have outridden guys a lot younger than I am on some really technical stuff. Still a pretty darn good bike although it is quite heavy.

JB

 

[Mellow Yellow]

Coil EX = Entry Level bike

Like Blue Sid said, if you paid approx $450 for a bike, you can't expect it to function like a $1450 bike. It sounds like you're aggresivly (in a good way). The bike is a very good bike. Just remember, you get what you pay for.

 

[AllSkinnedUp]

CoilEX isn't that bad.. come on!

Just remember, you get what you pay for.

Well everyone is happy to tell me what I already know. And by the way, it does perform like a high dollar bike and I ride heads up with all those "$$$$$$" bikes all the time.
I guess nobody ever replaced a BB & Crankset before in this forum. Remember, Biking, like Bull Riding, is 90% heart, 10% equipment! Save your money and Workout!

 

[Mellow Yellow]

Errr....

Well everyone is happy to tell me what I already know. And by the way, it does perform like a high dollar bike and I ride heads up with all those "$$$$$$" bikes all the time.
I guess nobody ever replaced a BB & Crankset before in this forum. Remember, Biking, like Bull Riding, is 90% heart, 10% equipment! Save your money and Workout!

I dear you to repeat that last statement in the Clydesdale board and see what kinds of answers you'll get. ALL of my bikes have broken and not because I do jumps, because I don't know how to do them but because I'm a clydesdale. But I do agree with you, the Coil EX is a very good bike.

 

[TeamRoundBoys]

Well everyone is happy to tell me what I already know. And by the way, it does perform like a high dollar bike and I ride heads up with all those "$$$$$$" bikes all the time.
I guess nobody ever replaced a BB & Crankset before in this forum. Remember, Biking, like Bull Riding, is 90% heart, 10% equipment! Save your money and Workout!

Look for a Truvativ stylo or firex crankset and bottom bracket. Truvativ isn't flashy but gets the job done. A RaceFace prodigy would also be fine. Just remember you will need an ISIS bottom bracket You should be able to find one on price point or Jenson Usa. What ever you do just spend less than 150 for the whole package.

Tools you will need
Pedal wrench
Square taper crank puller
bottom bracket tool
All these tools are available as generics or from Pedro's or Park tool. PM me for directions if you still want to do this.

 

[AllSkinnedUp]

Allright! A Real Biker

Look for a Truvativ stylo or firex crankset and bottom bracket.
RaceFace prodigy also fine. remember you will need an ISIS bottom bracket

I stand corrected. There are real Bikers in this forum. I am leaning towards the RaceFace Deus but it appears to include the Gearset and cranks too. That is what I want to do is replace it all. I want to replace the Deore Deraileur with something better. Like an XT or better. Any suggestions? Any experience with these? Are all BB's the same size? or is there ssomething I need to measure?

Thanks for offering your assistance.

Jerry

 

[TeamRoundBoys]

I stand corrected. There are real Bikers in this forum. I am leaning towards the RaceFace Deus but it appears to include the Gearset and cranks too. That is what I want to do is replace it all. I want to replace the Deore Deraileur with something better. Like an XT or better. Any suggestions? Any experience with these? Are all BB's the same size? or is there ssomething I need to measure?

Thanks for offering your assistance.

Jerry

Actually if you were one of my riding buddies I would tell you to go to pricepoint.com and order one of the Race Face Prodigy or Evolve crank/bottom bracket combos on sale now. All cyclists have to battle that little voice inside telling us to buy the newest and best parts. First, only fix what is broken. Shift your chain onto each ring on the crank and backpedal with the chain in the middle of your cassette. Are the rings bent at all? Now shift the chain to the smallest chainring and the largest cassette cog. Betweent the chain and the front drailleur cage the should be no more than the chain's with of room. Now do the same with the large ring/small cog. If you aren't possitively sure how to adjust your derailleurs/shifting I would study up on the subject. When do you adjust screws? cables? The best gear, if not properly tuned, still performs like crap. Also, the frame you have is entry level, a nice bike for the money, but still entry level. If I saw you on the trail with all brand new XTR components I would laugh. Keep this bike running on closeout, used and sale parts. But save your real change for your next bike. Replace only what you break with reasonable upgrades. I've ridden $300 bikes, I've ridden $3000 bikes. Putting icing on a turd does not make it dessert.

 

[AllSkinnedUp]

Come on! Jesus H. Christ...

Are you kidding? I have TWO (YES 2) $3000 (so called) bikes. I don't want any more! I just want to make my chain stop derailing on my TURD! You guys are so focused on your idea of what is "acceptable". Kiss my A$$$$$! If you cannot assist, leave me alone for christ sake! Your advice is like a$$holes...everyone (blah blah blah)

Putting icing on a turd does not make it dessert.

 

[TeamRoundBoys]

For someone who wrote "Save your money and workout" you sure are bent on spending it. You haven't actually stated your problem has been diagnosed. You didn't say whether your chainrings are bent, or if your front derailleur is even adjusted properly. You didn't say you read any of the posts and then checked your bike. You just want to put on a new crank and hope things will be fixed when it could really be a derailleur issue. If you wanted tech advice it has been dished out. If you wanted a product review, do a search instead of start a new thread.

 

[AllSkinnedUp]

My mistake

I thought this was a manufacturer forum. Evidently not.

 

[Mellow Yellow]

Dude, you need to relax

I thought this was a manufacturer forum. Evidently not.

You posted a question on a message board, didn't you think that you would get many different points of view? are you new at this whole message board thing?? Here are some facts:

Fact #1: You used to have $3000 bikes (by your own admision) and now you have a $450 bike.
Fact #2: The bike cost $450 because it is an entry level mountain bike. If Diamondback put higher quality BB's on the Coil EX, it would cost more than $450. If you think that's a load of crap; get a job in the corporate side of the cycling industry so that you can get a better understanding of what the definition of the term "price point" means.
Fact #3 'Blue Sid' and 'Teamroundboys' both gave you good advice about what BB and crank set to purchase next. I'm a big Truvativ fan. Both of my mountain bikes have Truvativ BBs and Crank sets with zero issues.
Fact #4 You need to relax
<img src=https://www.oqe.org/images/oqe1054.jpg>

 

[Wheel Doctor]

You posted a question on a message board, didn't you think that you would get many different points of view? are you new at this whole message board thing?? Here are some facts:

Fact #1: You used to have $3000 bikes (by your own admision) and now you have a $450 bike.
Fact #2: The bike cost $450 because it is an entry level mountain bike. If Diamondback put higher quality BB's on the Coil EX, it would cost more than $450. If you think that's a load of crap; get a job in the corporate side of the cycling industry so that you can get a better understanding of what the definition of the term "price point" means.
Fact #3 'Blue Sid' and 'Teamroundboys' both gave you good advice about what BB and crank set to purchase next. I'm a big Truvativ fan. Both of my mountain bikes have Truvativ BBs and Crank sets with zero issues.
Fact #4 You need to relax
<img src=https://www.oqe.org/images/oqe1054.jpg>

Yo dude!!!!

In addition, the simple phrase. "You get what you pay for". Bikes shops are not mind readers. Some who think they know everything will come into a shop and buy the wrong bike. The Coil EX is an LBS entry level bike. I won't knock RALEIGH or DiamondBack since I ride em', overall they provide excellent value to price at all levels.