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19 votes
Accepted

Reason why bike scratched up in this location under crankset

My guess is that this was caused by chain suck. This is a problem where the chain doesn't roll off the bottom of the chainring as readily as it should, and the chainring draws it up toward the ...
Adam Rice's user avatar
  • 30.1k
15 votes

Is it safe to cut off from the inside of my helmet?

Unbeknownst to many consumers, different helmet manufacturers use different molds for their helmets. Just like some shoe brands are known to be thinner or wider than other brands, some helmets are ...
RoboKaren's user avatar
  • 29.3k
15 votes

(Serious): Male genital protection for mountain biking/BMX and for common falls

Genital protection is rarely (if ever) used in cycling because it generally means putting some kind of hard surface in play (or excessive padding). Either of these can easily lead to some very ...
Deleted User's user avatar
13 votes
Accepted

Are convertible full face helmets as safe as regular ones?

Yes, some convertible helmets can be as safe as Full Face Helmets. The safety standard for the protection of a full face mountain bike helmet is ASTM F1952 - Standard Specification for Helmets Used ...
DWGKNZ's user avatar
  • 8,867
10 votes

What is the best way to protect frame from dents during crashes?

If you don't mind the looks, pipe insulation can protect your bike against both dings and scratches -- as well as bike thieves. Some people wrap duct tape over the foam to give the bike even worse ...
RoboKaren's user avatar
  • 29.3k
10 votes

What is the best way to protect frame from dents during crashes?

Your bicycle is probably as protected as its going to get when it comes out of the factory, so I'd suggest doing nothing (well, maybe crash less). Protective Film -- Cosmetic protection (possibly ...
Batman's user avatar
  • 46.3k
10 votes
Accepted

How well does Mountain Bike body armor work?

Body armor works fairly well at preventing abrasions and cuts, but does not do as well against impact damage. I wore a SixSixOne pressure suit for many years when downhilling. Basically during all ...
Deleted User's user avatar
9 votes
Accepted

Winter face protection

There are several companies that make masks designed for endurance sports during the winter. Air that cold can actually cause issues with your lungs when inspired for long periods. The secret is to ...
Deleted User's user avatar
9 votes

Is it safe to cut off from the inside of my helmet?

Does a bicycle helmet still has protection when slicing some 1-2 mm from the inner rigid foam at a size of a 1-2 cm circle? You don't know. It's as simple as that. The amount of material you're ...
David Richerby's user avatar
7 votes

(Serious): Male genital protection for mountain biking/BMX and for common falls

I struggled with that same question many years ago - and tried my share of products. The difficulty is that anything large or hard enough to provide any real protection is always incompatible with a ...
SteveJ's user avatar
  • 698
7 votes
Accepted

Please suggest a Hitch Bike Rack Theft Protection Solution

As suggested in the comments, removing the rack is by far the most secure option. The hitch rack pin can be replaced with a locking pin. Alternately if the end of the hitch is accessible and sticks ...
mattnz's user avatar
  • 51.3k
7 votes

What is this complete bicycle chain guard or chain protector in the photo?

These chain guards (or "kettingkast" in Dutch) are standard on single speed or internally geared hub bicycles in The Netherlands. The traditional ones are made from "lakdoek", ...
Brendon's user avatar
  • 71
6 votes

Suitability of open sided bearings for frame pivots

I can only speak somewhat objectively to the bearing size. I believe that 689 is the complete specification for the bearing size. This appears to be a 9mm inner race, 17mm outer race, 5mm deep size. (...
Weiwen Ng's user avatar
  • 32.8k
6 votes
Accepted

What are my options for keeping my prescription eyeglasses on and adding helmet+goggles while cycling?

I have glasses, and need them for anything. Normal full-strength prescription glasses are required for me to drive, so the same prescription is appropriate for riding, about +11.5 from memory. ...
Criggie's user avatar
  • 127k
5 votes

is bicycle helmet actually safe?

Wearing a bicycle helmet is safer than not wearing one. Bear in mind that a helmet that has been "crashed" needs to be replaced. Its ability to absorb/diffuse energy after having been landed on will ...
user34538's user avatar
5 votes

Is it safe to cut off from the inside of my helmet?

The main function of a helmet is to absorb energy during an impact, I you think about it, the material that is between your head and the object being impacted, is compressed or crushed during the ...
Jahaziel's user avatar
  • 12.6k
4 votes

Schwalbe Marathon Plus and Micheli Protek Max: what are the fundamental differences?

The actual differences would be known only to people who have been involved in product development or sales, and they would likely be under a NDA. So, let's speculate. Weight: Both are very heavy ...
ojs's user avatar
  • 22.2k
4 votes

How to protect bike frame mounted on the carrying rack?

Pool noodles, cut lengthwise and held in place with gaffer tape (or hockey tape if you're so-inclined) Bonus marks for colour-coordinating with your bike and car. Do the whole length of the rack ...
Criggie's user avatar
  • 127k
4 votes

Winter face protection

The first thing you need to worry about in winter is your lungs. You breathe much and air that you breathe in does not get warmed enough before it gets to lungs, that's why I use fullface fleece cloth ...
filimonic's user avatar
  • 187
4 votes

Getting a Brompton on and off a plane without going broke

You get what you pay for - you cannot travel heavy (A bike is traveling heavy) and cheap. Traditionally US has the highest baggage allowances in the world, international travel outside the US (cattle ...
mattnz's user avatar
  • 51.3k
4 votes
Accepted

How to protect inner tube on wider rims?

For band-type rim strips or traditional cotton tape etc, there is not a strict corollary between rim internal width and width of the strip. It just needs to sit in place properly while reliably ...
Nathan Knutson's user avatar
3 votes

Wheel spoke reflector Flectr

No I've not used those specific ones. However I have used spoke-mounted clip-on reflectors, and consider them far superior to the traditional yellow plastic blobs that adorn many new bikes. ...
Criggie's user avatar
  • 127k
3 votes

How to protect bike frame mounted on the carrying rack?

This isn't exactly what your are looking for but it is simple solution. I use cheap foam self seal pipe insulation of various diameters and put them on parts of bike that can be damaged during ...
False Identity's user avatar
3 votes

What is this complete bicycle chain guard or chain protector in the photo?

That is a chain case, not just a bolt-on guard. The bike looks like a single speed or an IGH, so there is no cassette or derailleur and only one chainring at the front. The case is an integral part ...
Criggie's user avatar
  • 127k
3 votes

What are my options for keeping my prescription eyeglasses on and adding helmet+goggles while cycling?

Intended for road use there are aero helmets with built in/removable visors (expensive example from Giro). These can be worn with prescription glasses underneath. So not strictly goggles but a pretty ...
Chris H's user avatar
  • 60.3k
2 votes

How to protect bike frame mounted on the carrying rack?

I used to have a Saris Bones rack and ended up wearing right through the paint in several spots. I learned that simply wrapping a sock (or other cloth) around the tube/spot in question and tightening ...
Aaron's user avatar
  • 5,077
2 votes
Accepted

What is a good way to weatherproof a bike outside

Just leave it alone. If you have a steel bike and theres gaps in the paint, the rust is likely cosmetic, but you can carefully sand and prime and paint the area. Aluminum and Carbon fiber shouldn't ...
Batman's user avatar
  • 46.3k
2 votes

(Serious): Male genital protection for mountain biking/BMX and for common falls

You can try wearing a jockstrap and cup, as is common in many other sports, but there's a good chance it'll prevent you from sitting properly on the saddle. You can also try using the female version (...
PunctualEmoticon's user avatar
2 votes

How to protect bike frame mounted on the carrying rack?

With some racks, especially racks that hang the bike from its frame, Rack-Rash is a thing you learn to live with as its practically impossible to prevent. The price of cheaper racks is often (but not ...
mattnz's user avatar
  • 51.3k
2 votes

Would a military helmet make a safe alternative to a bicycle helmet?

It depends, if you get a WWII surplus helmet, then no, definitely not. They do not meet any safety regulations and have no cushioning to absorb the impact of a crash. A modern combat helmet (i.e. ...
Sean's user avatar
  • 21

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