Bicycles Stack Exchange Community Digest

Top new questions this week:

Left crank arm misaligned on climb

On a climb I started to notice something feeling similar to a slipping chain. A couple minutes later while pedaling standing up, my left crank arm got completely misaligned as you can see in the ...

crankset  
user avatar asked by nikostra Score of 10
user avatar answered by Criggie Score of 17

How artificial is the lack of 450%+/50t+ gearing on lesser 1x groups?

ESSA, CUES, Advent, Advent X, Acolyte, Sword, and other sub-12-speed low-end groups are all range-impaired compared to what you can get by spending more. Extend it out to 12-speed and there's Eagle SX,...

shimano derailleur-rear frugal 1-by-x microshift  
user avatar asked by Nathan Knutson Score of 8
user avatar answered by Weiwen Ng Score of 4

Are there published figures on aero loss to tyre tread?

I was working on my hardtail yesterday, and found myself spinning the back wheel on the stand while indexing the gears. I noticed quite a lot of airflow, which was obviously from the the knobbly ...

tire aerodynamics  
user avatar asked by Chris H Score of 7
user avatar answered by Weiwen Ng Score of 4

What standards did velocipedes have when they were invented?

It seems from the wikipedia page that velocipedes were one DIY that was copied by many others. They say about the first example by Baron Karl von Drais: This design was welcomed by mechanically ...

history  
user avatar asked by bitmaker Score of 6
user avatar answered by L.Dutch Score of 14

Can you shed some light on this dust-shielding ferrule?

I understand that the two parts at the top of the image are an improved ferrule. They rest against the lowermost cable rest — the one nearest to the rear derailleur. Can you shed some light on these ...

derailleur-rear shifting  
user avatar asked by Sam7919 Score of 5
user avatar answered by MaplePanda Score of 9

What is the name of the floor pump part that depresses the valve stem?

What is the name of the part in the floor pump chuck that depresses the valve stem? Is it standard enough that I could buy a replacement? I mainly use this pump to inflate presta tires. From what I ...

pump presta schrader  
user avatar asked by Zack Score of 5
user avatar answered by Chris H Score of 9

Correct routing for strap on Portland Design Works Origami rear fender

I have a Portland Design Works Origami rear fender. The strap that holds it on came loose while adjusting it and came completely out of the clip device. I have tried putting it back through in a few ...

fenders  
user avatar asked by spon Score of 3
user avatar answered by Adam Rice Score of 4

Greatest hits from previous weeks:

What is the easiest way to fix a loose chain?

Are there adjustments that can be made instead of replacing it?

chain  
user avatar asked by mrooney Score of 15
user avatar answered by Dustin Ingram Score of 9

Are road bikes capable of being ridden on gravel?

I am new to road bikes and was wondering if these bikes are capable of riding on light gravel or whether I will get flats? Does it depend on the tire material or are generally all road bike tires for ...

road-bike gravel  
user avatar asked by Ura Score of 15
user avatar answered by Fred the Magic Wonder Dog Score of 17

Is it better to get an entry-level carbon bike or a similarly priced aluminum bike?

I am going to buy my first proper road bike, and I have been comparing entry-level carbon frames with top-level aluminum frames in the same series (Giant Defy). What are the benefits of carbon vs. ...

road-bike  
user avatar asked by Andrew Welch Score of 24
user avatar answered by mattnz Score of 15

Can I put 700c tires on rims made for 27 x 1.25"?

It's getting hard to find any selection for my old Avanti 12 speed. it currently uses 27 x 1.25 inch tires. Can I put 700c tires without needing to buy new rims?

tire rims  
user avatar asked by CylingWolf Score of 20
user avatar answered by ʍǝɥʇɐɯ Score of 17

Pros and cons of single-sided forks (Cannondale Lefty)?

Looks like they save some weight, but how do they have a better strength/weight ratio than a traditional two legged fork? With the single-legged fork the fork and axle must resist huge bending all ...

mountain-bike fork suspension cannondale lefty-fork  
user avatar asked by Jerryno Score of 45
user avatar answered by Jerryno Score of 43

How do on-road mountain bike speeds translate to road bike speeds?

When cycling on roads on my mountain bike, I generally get around 10-12 miles per hour on a flat surface. What sort of speeds can I expect to get on a road bike?

road-bike  
user avatar asked by user155695 Score of 49
user avatar answered by Gary.Ray Score of 52

What size are the nuts holding the front wheel?

I am trying to install a front wheel on a bike - the axle of the wheel is threaded, but I'm having trouble finding out what size thread it is, and what nut can go on this. The size of the thread on ...

wheels front  
user avatar asked by ria Score of 13
user avatar answered by whatsisname Score of 5

Can you answer these questions?

Can't remove bleed screw SRAM shifter

I'm trying to bleed my SRAM Force D2 brakes, but I can't remove the bleed screw underneath the shifter cover: When I try to remove the torx screw, the round part underneath (with the 111... numbers) ...

maintenance hydraulic-disc-brake sram  
user avatar asked by Bart Score of 1

How do you stop the rubber shield from wandering unless you lock it behind the shift outer cap w/ tongue, which introduces a compressible sheath?

I installed the two parts shift outer cap with long tongue, and rubber shield as shown below, but I'm not absolutely sure this is right. If I put the rubber shield (the one on the right in the ...

derailleur-rear shifting  
user avatar asked by Sam7919 Score of 1
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