22 votes

My bike goes up one gear at a time, but down two: is this normal?

On or off road, but especially off road, it is desirable to be able to shift down more than one gear at a time to deal with abrupt changes in gradient and avoid being stuck in too a high a gear and ...
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17 votes

Mechanic says not to use top three/bottom two gears or the chain will throw

You have a double front, right? The usual advice is to not shift into the highest 3 gears in the rear cassette when in front the chain is on the large chainring, and to not shift into the smallest 3 ...
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  • 12.9k
14 votes
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How to attach cable mounting points to a bicycle frame?

I'd go with full housing for both brake and gear cables and hold the cables on with cable clamps. There are many kinds of cable clamps to choose from. I prefer the type that have a screw clamp over ...
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  • 16.3k
12 votes
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My bike goes up one gear at a time, but down two: is this normal?

Depending on the year of your Giant Escape 3, it either has Shimano EF40 or EF41 shifters. Both shifters have the same User Manual which has this information on downshifting: Assuming you are talking ...
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  • 236
12 votes

Shifting direction is different for front and rear shifters

The reason why shifting is arranged this way: Shifting to a larger chainring at the front gives a higher gear ratio, shifting to a larger sprocket at the rear gives a lower gear ratio. Shifting to ...
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11 votes
Accepted

Mechanic says not to use top three/bottom two gears or the chain will throw

Not using the upper and lower gears is a very effective solution. Stupid, but effective. Traditionally one would simply use the limit screws (at the rear derailleur, often marked L(ow) and H(igh)). ...
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  • 2,542
10 votes
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How to lower gearing on Tiagra 4700

Shimano's most recent compatibility chart is available here. Note that these are official compatibility ratings. It is fine to exceed official specs by a bit. At the rear, you can get a 10s Tiagra ...
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  • 19.5k
10 votes
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Derailleur can't shift to 51-T sprocket. Deore CS-M5100 + RD-M5100

Turns out this derailleur needs a 'standard mount' derailleur pad/hanger. I have currently a direct mount. The Canyon representative thought the SRAM hanger was for 10 speed. To me, it is now clear ...
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  • 181
10 votes

Shifting direction is different for front and rear shifters

This is the way most (99.999%) of bikes work. If you really want to change it - I advise against such a move, the only option would be hunt out a (fortunately) now defunct "Rapid Rise" or &...
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  • 40k
9 votes

Is there such thing as an automatic transmission for bikes?

As the Nuvinci system has been mentioned in other answers, I'll mention one more. SRAM makes the Automatix hub now. It's a 2 speed system (ratios 1:1, 1:1.37) with a centrifugal clutch. There's no ...
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  • 45.5k
9 votes
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Is there a difference of spacing between cogs on a 7 speed cassette vs a 8 speed cassette?

Yes, there is. Shimano/SRAM & compatible seven speed is 5mm cog-to-cog, and eight is 4.8mm. Generally what you're trying to do here can't be made to work very well. There are some tricks that ...
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9 votes

Rear derailleur cage bigger than cassette necessity

An RD-5701 rear derailleur should work just fine as a replacement for an RD-6600. I've used an RD-5701 with an 11/28 cassette for the last 6-7 months with no issues, including swapping my crankset ...
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  • 8,783
9 votes

Derailleur mounting position

Welding is probably a bad idea - for several reasons. Heat changes things - no doubt you have welding skills, but you'll know that relatively thin metals warp and bend and change their temper. The ...
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  • 99.1k
8 votes
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Misadjusted B-screw: symptoms?

The B-screw controls the body angle of the derailleur. It pulls the pulleys away from the sprockets, so you don't rub against them. If you set it in the largest rear cog (as you should), when you're ...
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  • 45.5k
8 votes

Mechanic says not to use top three/bottom two gears or the chain will throw

Crossing chaining hasn't been any problem at all since the invention of bushless chains 20+ years ago and wasn't even a real problem back in the ancient days. It's a persistent myth that just won't ...
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8 votes

Parking a 3-speed internal hub in 2nd gear permanently

In the 45 minutes since I posted this question, I have developed an elegant workaround using a simple device: I stuck a pebble in the bellcrank. Most folks here probably won't be surprised by this ...
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  • 561
8 votes

Down shift quickly

To answer this part of the question: Are there any hacks or types of shifters that let you quickly shift down across the gear range Grip shifters should allow one to click through the whole range ...
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8 votes
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11 speed shifter levers on my 10 speed drivetrain

No, won’t work. Edit: To be more precise: The indexing will be off. The 11 speed road shifters pull more cable for each gear step (each “click”). So you’ll have shifted through the whole 10 speed ...
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  • 19.7k
8 votes

45 day old SRAM rear derailleurs jumps gears

When the shifting skips over a cog on the cassette gears, this is because the derailleur hanger (or less often, the derailleur cage) is misaligned. That is, the small sacrificial tab of aluminium ...
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  • 12k
7 votes
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Cannot shift into lowest gear

Either the L screw which limits how far the derailleur can move towards the wheel is too far in or the cable tension is too low. Try to increase the cable tension first by turning the barrel adjuster ...
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  • 19.7k
7 votes
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No trim and can't shift into small chainring

Sounds like you have a bit too much cable tension in your new configuration. Usually cable tension is tuned with the barrel adjuster you mentioned, but if you cannot get the tension low enough with ...
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7 votes

Why does my vintage Shimano rear derailleur come with brake style cable housing?

I assume that you have a friction shifter? A friction shifter is one that does not click into an indexed position. You just adjust it until the derailleur is lined up where you want it. Assuming this ...
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7 votes

How to run full length cable housing to front mech on a frame without cable stops?

It looks to me like you may be able to use a clamp-on cable stop. All you need is a round steel-alloy frame tube that is strong enough to accept a clamp. If the clamp is located close to the point ...
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  • 502
6 votes
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Do I have to stop pedaling when shifting up the front chainring?

Use the Clutch! This is what I always tell people when I'm teaching them how to shift gears properly. Chain-rings and Cogs are machined with *pickup points" that assist transferring the chain from ...
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  • 1,938
6 votes

Poor shifting in dense fog?

I would suggest temperature change may be affecting the cable housing dimensions, which in turn affects the cable tension and therefore the dérailleur settings. I have been noticing this happening to ...
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  • 29.8k
6 votes
Accepted

replacing shifter cable housing?

Its likely that your bad shifting is due to messed up cables or a misadjusted derailleur. You can either cut the cable crimp off at the end of the cable with a pair of pliers, or pull it off with a ...
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  • 45.5k
6 votes
Accepted

How does a RD (rear derailleur) handle variable tooth gaps?

In reality the derailleur doesn't care what the tooth count difference is between gears. The shifter simply moves the derailleur towards or away from the wheel. This causes the chain to be misaligned ...
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  • 18k
6 votes
Accepted

Bike won't shift at all

I'm familiar with RSX brifters (brake and shift combo units) If that's what you have then its likely the grease has gummed up, stopping the under-lever from engaging the release. You might be able ...
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  • 99.1k
6 votes

Info for replacing a shift cable housing

I would suggest replacing the inner as well as all the outers. If the inner is frayed at all, you will not be able to rethread it. The benefits of a new cable are much better shifting, to the point ...
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  • 40k
6 votes
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How exactly does cross-chaining accelerate wear?

When the chain is bent sideways, the load at links is concentrated on one end of the pin and single side plate while the link is turned. This is supposed to wear that side of the link faster. Once the ...
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  • 19.4k

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