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Locked up Shimano SG-7C18
Forum: Derailleurs & Shifters
Last Post: Jakobberry
Yesterday, 08:06 PM
» Replies: 0
» Views: 107
Crank Rookie
Forum: Cranks & Pedals
Last Post: painkiller
09-18-2017, 11:13 PM
» Replies: 5
» Views: 393
Thrift store find - pleas...
Forum: Show off your bike!
Last Post: dalrph94
09-13-2017, 11:35 PM
» Replies: 0
» Views: 446
What's causing this noise...
Forum: General Questions
Last Post: Nozza123
09-13-2017, 09:42 AM
» Replies: 0
» Views: 465
Finding the manufacturer ...
Forum: Bikes & Components
Last Post: stevehoster@att.net
09-11-2017, 07:29 PM
» Replies: 0
» Views: 499
How would I know if my sh...
Forum: Derailleurs & Shifters
Last Post: chiproth22
09-09-2017, 03:57 PM
» Replies: 0
» Views: 669
Mavic hub service
Forum: Wheels & Hubs
Last Post: pygmytwylyte
09-07-2017, 05:41 PM
» Replies: 0
» Views: 633
Matching New Chainring to...
Forum: Chain, Chainrings & Sprockets
Last Post: Eugbug
09-04-2017, 05:54 PM
» Replies: 1
» Views: 691
front suspension fork
Forum: Frame & Forks
Last Post: WesleyNL
09-02-2017, 12:38 PM
» Replies: 0
» Views: 778
Replacement for BB-CT92E ...
Forum: Bottom Brackets
Last Post: relative4
08-29-2017, 03:07 PM
» Replies: 0
» Views: 920
MTB Ghost Shifting fix
Forum: Derailleurs & Shifters
Last Post: Javax1
08-26-2017, 08:02 PM
» Replies: 0
» Views: 1,032
Pedal Washers ?
Forum: Cranks & Pedals
Last Post: kotrebs
08-25-2017, 11:16 AM
» Replies: 3
» Views: 2,864
26" Mongoose Excursion
Forum: Chain, Chainrings & Sprockets
Last Post: ntomita
08-23-2017, 08:46 PM
» Replies: 0
» Views: 1,004
Rear Derailer/ Aluminum f...
Forum: Frame & Forks
Last Post: Hikel67
08-20-2017, 03:15 PM
» Replies: 0
» Views: 990
What is this part?
Forum: General Questions
Last Post: idrivebig
08-15-2017, 12:55 PM
» Replies: 2
» Views: 1,264
Bike part identification ...
Forum: Brakes & Levers
Last Post: Squarewheel
08-15-2017, 08:24 AM
» Replies: 5
» Views: 2,175
Upgrading old SIS drivech...
Forum: General Questions
Last Post: painkiller
08-10-2017, 11:04 PM
» Replies: 1
» Views: 1,413
Chain link removal and re...
Forum: General Questions
Last Post: Desmond
08-09-2017, 06:19 PM
» Replies: 4
» Views: 1,529
Bike repair manual
Forum: Tools & Shop
Last Post: condor
08-06-2017, 08:48 PM
» Replies: 10
» Views: 5,097
30 Bikes Per Day?
Forum: Tools & Shop
Last Post: condor
08-06-2017, 08:07 PM
» Replies: 20
» Views: 12,250

 
  Locked up Shimano SG-7C18
Posted by: Jakobberry - Yesterday, 08:06 PM - Forum: Derailleurs & Shifters - No Replies

Hi.
I just bought a used bike and had to change the inner tube in the back wheel. Putting the wheel back on I forgot to reattach the brake arm. I jumped on the bike and almost immediately the wheel locked up.
I've taken everything apart and put it back together again, but the wheel just won't move.
Does anyone know what I messed up here?


  Crank Rookie
Posted by: freedbill - 09-16-2017, 04:13 PM - Forum: Cranks & Pedals - Replies (5)

I picked up a low end Cannondale Hybrid (1999 H300) to get back into cycling and to learn a few things about bike mechanics. The bike is great for fitness, but I've started to tear it apart and refit with some inexpensive upgrades, as that is the stuff I love to do. My latest project has been to replace the BB (110-68 square taper-JIS) and upgrade he crank. The original spec listed the crankset as a C.P.I, but once I pulled it I found it to be a 175mm Shimano FC-M290 and it had been the subject of a recall in the late 1990s, so I'm glad I'm doing this upgrade.

The original crank was a 24/34/42 which I plan to replace with a 30/42/52 FSA Vero crankset. Here is where my problem lies. The new FSA crankset slides in too close to the frame. Upon closer inspection I have come to realize the not all crankset BB shafts are created equal. The original Shimano crankset BB shaft extends beyond the innermost chain ring by about 1/8" inch...an "outie", so to speak. The FSA chainring BB shaft is recessed, an "innie", and therefore slides too close to the frame. So I have learned that cranks come as "innies" and "outies".

Can anyone recommend a reasonable triple crank that will fit my "outie" needs. I'd like the largest ring to be in the neighborhood 48-52 teeth. When I look at pictures of cranks, it is really not possible to determine the BB shaft length on the inside. I'm sure there is a more technical description, I'm just not sure what it is.

Thanks to all who have taken the time to read my lengthy post. Any advice will be greatly appreciated.

Bill


  Thrift store find - please help ID
Posted by: dalrph94 - 09-13-2017, 11:35 PM - Forum: Show off your bike! - No Replies

[Image: cB99we.jpg][Image: HsTDui.jpg][Image: fBPPRe.jpg]


Schwinn Super Le Tour that's been converted to a single speed?


  What's causing this noise in the rear wheel?
Posted by: Nozza123 - 09-13-2017, 09:42 AM - Forum: General Questions - No Replies

Hey guys, I need help figuring out what this strange noise is when I turn my rear wheel. I recently got my bike serviced, went riding on an extreme track, then.. crashed. I started pedaling and the rear wheel kept making a weird noise. It sounds like it's rubbing against something? I may have bent the disc rotor? Here is a video: https://vid.me/tpy10


  Finding the manufacturer of my Free Spirit bike
Posted by: stevehoster@att.net - 09-11-2017, 07:29 PM - Forum: Bikes & Components - No Replies

I recently acquired a used Free Spirit bike, and the serial number is 322 472710. Can the manufacturer of this bike be identified with this serial number?


  How would I know if my shifter is broken
Posted by: chiproth22 - 09-09-2017, 03:57 PM - Forum: Derailleurs & Shifters - No Replies

This concerns a Shimano Tiagra 4600 2x shifter.

There is travel remaining in the rear deraileur, but none in the shifter itself. I can't reach the two biggest cogs using either of the front chainrings.

I did dump the bike, albeit not hard. However, that accident caused the shifter housing to become out of line with the handlebars. I suspect either my repair efforts or the crash have damaged the shifter.

The crash did bend the rear deraileur, but that has since been replaced and aligned.

Thanks,

Chip


  Mavic hub service
Posted by: pygmytwylyte - 09-07-2017, 05:41 PM - Forum: Wheels & Hubs - No Replies

Hi everyone,

Recently I had some trouble with my freehub. As my local bikes shops are reluctant to fix my bike, because of being a b'twin (it's my work bike), I tried fixing the problem myself.

Now, servicing my freehub and bearings wasn't much of a problem. En passent I also installed a fresh cassette and chain. Plenty of information on that online.

The problems are now in trying to reinstall the wheel in the brackets of the frame. It's noticably more difficult to get them in the way they should, even now it feels like it just needs that little extra push to get all the way into the brackets but it just won't give. This hasn't been a problem in the past.

There is a lot I don't get about the nuts and bolt on the drive and non drive side of the hub. I kinda get how they interplay with eachother but not what I'm really supposed to do with them. Do I need to tighten everything way up? But then my freebody won't be able to move (I think).

The wheel won't really 'freespin' like before now. Does this mean I have to tighten all the bolt way up so the axle has more 'room' to spin? i'm happy to supply pictures if neccesary.

Anyone who could help me solve this, I'd really appreciated it. Anything not to give the local bike shop the pleasure of eying my b'twin like it's a piece of crap. (while it's in fact the best value for money bike I've ever had for my commute tot work)

Please excuse any typos as English is not my first language.


  Matching New Chainring to Freewheel
Posted by: Eugbug - 09-04-2017, 02:43 PM - Forum: Chain, Chainrings & Sprockets - Replies (1)

The chain is slipping on my MTB when I'm on the middle chainring and smallest sprocket on the back, but only when I put a lot of force on the pedals.  I replaced the chain last year along with the 7 speed freewheel and the middle 32T chainring. I've probably cycled only 1000 to 1500 miles since and tried to only oil the chain when it was clean, so I'm not sure whether it is excessively worn (have to check).
Should I just replace the chain? The smallest sprocket at the back doesn't look worn (no shark/hooked  teeth), so I don't think the chain is slipping on that, rather the chainring. If I buy a new chairing, does it need to be matched to the freewheel? Specs on ads mention that a chainring is for an e.g. 9 speed.


  front suspension fork
Posted by: WesleyNL - 09-02-2017, 12:38 PM - Forum: Frame & Forks - No Replies

guys i wanted to maintench my front fork suspension and now i have a problem,

Brand is a cogan but i disambled every screw from it and it just won't detach the pipes to clean them

http://imgur.com/a/WXHKG

i removed bottom the top seals and all of the spring thats inside but pipes wont come off, so i wanted to screw them all together and now the bottom scres where going inside so cant use the bolds anymore


  Replacement for BB-CT92E 68/116
Posted by: relative4 - 08-29-2017, 03:07 PM - Forum: Bottom Brackets - No Replies

I have a 1999 Trek 820 AL whose bottom bracket is dying.  According to the spec sheet, it's a Shimano BB-CT92E, 68mm shell, 116mm spindle, English threading.  What is the easiest way to identify a suitable replacement?  I found a NOS BB-CT91 with the same measurements on eBay for $20, any reason not to pull the trigger on that?  Thanks!


  MTB Ghost Shifting fix
Posted by: Javax1 - 08-26-2017, 08:02 PM - Forum: Derailleurs & Shifters - No Replies

First bike in 7 years and I'm recently experiencing Ghost shifting, I know little to nothing about repairing bikes and I'm in need of help of how to stop the bike from shifting on its own it is very frustrating and makes it difficult to ride at times


  26" Mongoose Excursion
Posted by: ntomita - 08-23-2017, 08:46 PM - Forum: Chain, Chainrings & Sprockets - No Replies

Hi, All!

I recently got a broken bike from one of my friends, and want to fix it as a fun project.
Seemingly its chain is off from the rail and completely distorted like a helix, so it needs to be replaced. Also, rear derailleur is shattered into two parts, each has a gear, not sure if it can be repaired as I'm a total newbie, so I decided to buy a new part for it as well.

However, I don't know which parts should I buy. I checked official documents for maintenance but it doesn't describe the specifications of parts. Does anybody have ideas which parts to buy? I'm happy with 3rd party parts for cheaper cost or used parts from ebay. Any input is helpful! Thanks in advance!

Here's my bike:
https://www.dropbox.com/s/hdf6spnm8k9bk3j/2017-08-23%2010.48.59.jpg?dl=0
https://www.dropbox.com/s/vgrz3i8zdz5b6oy/2017-08-23%2010.49.11.jpg?dl=0
https://www.dropbox.com/s/hfl0fb8gy1qy0uj/2017-08-23%2010.50.02.jpg?dl=0
https://www.dropbox.com/s/sqotby6zqsvywys/2017-08-23%2010.50.28.jpg?dl=0

Also, this is the same model:
https://www.walmart.com/ip/26-Mongoose-Excursion-Ladies-Mountain-Bike/48520137


  Rear Derailer/ Aluminum frame hanger
Posted by: Hikel67 - 08-20-2017, 03:15 PM - Forum: Frame & Forks - No Replies

I have an older aluminum Pacific 5000 moutain bike that I've turned into a nice 26" cruiser. My problem is the rear derailer popped off the hanger while a friend wad using it. The hanger is solid with the frame and the threads are now stripped out. How can I fix this issue in order to mount my derailer?


  What is this part?
Posted by: idrivebig - 08-14-2017, 07:10 PM - Forum: General Questions - Replies (2)

This was on the rear wheel of a recently purchased GT Aggressor.  I had to remove the quick release axle to take it off.  Can't figure out what it is.

[img][Image: IMG_20170814_133845363_zpsn2ighvhy.jpg][/img][img]


  Upgrading old SIS drivechain
Posted by: olliej - 08-10-2017, 08:07 AM - Forum: General Questions - Replies (1)

I have brought an old Giant GSR200 (early 90's I would guess), as a hack to use to commute to the station in the morning, and leaved locked all day. I am happy with the condition of the bike, and for a tenner it was a bargin!

The only issue I have is that being so old it has Shimano SIS thumb shifters (the ones on the top of the bars). I would really like to change these as I find them awkward to use, so I started to search around on google for help but now I am confused more (I am very mechanically minded, but have little experience with bikes!).

So far I have established that I have a 6spd rear cassette(?) which is not the cartridge type but the screw on freewheel type and a Shimano SIS rear derailleur. It looks like to change to either gripshift or rapidfire (preferred) will warrent a change to a 7sp at the rear (unless anyone knows of a source of 6sp shifters?). I am happy to do this, but this is where I get lost.

What do I need to know/consider and how to I go about working out if this is possible. Can i change the 6sp for a 7sp cassette/freewheel assembly? Is there a better way to get around this problem?

I'm happy to spend a bit on this (>£50), partly for the experience of making the changes and learning through doing!

Any help would be greatly appreciated!!!


  Chain link removal and repair
Posted by: Desmond - 08-05-2017, 04:36 PM - Forum: General Questions - Replies (4)

Hi. I am new to this forum and not a biker. I am 60 years old. Somebody gave me a mountain bike although it looks big for a mountain bike it has 9*3 gears. The chain snapped and in desperation I went to a you tube forum to see how to repair it. I bought a chain link extractor.

[Image: ChainLinkRemover.jpg]

The extractor was difficult to turn and the chain didn't sit comfortably in the device. The result is a knacked tool that appears to be cross threaded. and having removed 2 links and made the join it broke again.

Can't afford bike shop repair charges and would like to attempt this myself.


  Strange Brake Wear?
Posted by: garrett01 - 08-04-2017, 09:27 PM - Forum: Brakes & Levers - No Replies

It's been a while since I've looked at my 1981 Free Spirit Pinnacle (27" road bike), but I can recall the last time I rode it I almost had some "close calls" because the brakes were gone.

However, on closer inspection, it looks like (to me) that there is plenty of "padding" on the brake pad. The only issue is there is a groove wore into the pads. None of the brakes stop.

Front brakes
[Image: YDBCW7iSWDILsjkp4dg1a8DdVS5X6puWvttkYvjf...32-h767-no]
Link (for in case the image doesn't show)
Rear brakes
[Image: DNibBvYnrbnH7BcOvtikLyhE7DkFM0oBfOSFUuuQ...32-h767-no]
Link (for in case the image doesn't show)
A closer look (rear)...
[Image: RUKhteR1whXT3QyI0ycrsmOFnBGU6RmAx_EO7jDg...64-h767-no]
Link (for in case the image doesn't show)

What could be causing this? I'd like to figure out the culprit before I replace the pads.

Also: is there a special type of brake pads I need to buy? I measured them and they're 1.5". I've never purchased brake pads on my own (always had the LBS do that - before they closed up shop), so I'm not really sure what I need to look for. Is there any special method of replacing brake pads?


  Electra Bike Frames
Posted by: TallRider67 - 08-02-2017, 11:41 PM - Forum: Frame & Forks - Replies (1)

My wife got a brand new Electra Townie for her birthday.  On it's first big ride at the Portland WNBR, some asshat moved over on her, forcing her to lay her bike down against a concrete block, which dinged up the paint on the fork and frame.  I'm trying to find some touch up paint, and Electra is no help.  They won't even tell me who makes their frames so I might be able to ask directly for some touch up paint.  Does anyone know who makes their frames, or where I might find some touch up paint?


  New 3 speed hub with coaster brake: brake squeals and sticks
Posted by: unusualhuman - 08-01-2017, 04:14 PM - Forum: Brakes & Levers - No Replies

I recently purchased a used (nearly new) Sun Traditional adult Tricycle, 2016  model, and attempted to add on a brand new 3 speed conversion kit purchased through Amazon. The kit is made by Sturmey Archer, and intended for Sun trikes like mine from 2015 and newer.

As far as I can tell, I've installed the hub correctly. It shifts smoothly and runs well.

However, the coaster brake makes a weird squealing noise when applied, and often sticks a bit.

Here is a link to a short video, shot through the rear basket. First i cycle through all gears, then demonstrate the weird noise it makes when the brake is applied. Higher speed = louder noise, and more sticking when I resume pedaling.  

https://youtu.be/kRiYaPo6F_0

It does not make the noise when I test the hub and brake by lifting the rear wheel and turn the pedals with the other hand, but only when I ride. Fwiw, I'm a thin person,  and the trike fits me just fine, so I'm not "overstressing" the brake with my own weight.

Does anyone have any idea if this could be a defective hub, or if I've made an installation error? I'm hoping to avoid visiting the local bike shop, in order to save some money, but will do so if needed.

I certainly appreciate any help offered.

Thanks!
Laura


  Rear hub spins to a near stop, then reverses to a stop
Posted by: Gogogordy - 07-23-2017, 02:37 PM - Forum: Wheels & Hubs - Replies (2)

I have 2 fairly new, mid-range folders which ride quite well d seem like good bikes for the cost. 8 sp. Shimano components.

I have a 7 second video of this.

When I was recently cleaning-lubing the drivetrain, one of them was wheels-up and I did the customary pedal-spin the rear wheel and when it the wheel slows down to a near stop, it reverses direction for a small fraction of a rotation, then stops.

My first suspicion is the hub bearings are too tight (way too) , but Im presently more experienced in the vintage beach cruiser genre, so any advice for a multi-speed hub would be welcomed.

TIA




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