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0
votes
4answers
138 views

how to increace the friction between tyre and road [closed]

While designing a bicycle what are the designing factors to be considered to increase the friction to give more efficiency to the cycle.And what are the other factors that can be considered while ...
3
votes
3answers
643 views

What's this part of the bike, and is it safe to alter it?

The video shows someone installing a gps bike tracker, however there is not much room in the top of the head tube, so he hammers down what's already in there in order to make room for the tracker. In ...
7
votes
4answers
572 views

To Cold Set or Not To Cold Set?

I have a Trek 620 (Reynolds 531 lugged steel frame) from the mid-80s the rear dropouts are spaced at 126 mm. I'd like to be able to run an 8- or 9-speed cassette and I was wondering about the issues ...
3
votes
3answers
2k views

Replacing an 8-speed cassette with a 9-speed one to make my bike faster

I'd like to make my 8-speed tokyobike Classic Sport city bike go faster so I'm considering replacing the 8-speed cassette with a 9-speed one which can be found on the tokyobike Sport. The bike has ...
2
votes
2answers
95 views

Does anyone know of a machinist who could convert a dual ring Campy Nuovo Record chainset ('spider') to accept a 3rd chainring?

I have a 1971 Raleigh International whose Campagnolo Nuovo Record chainset has Campy pedals that are 'frozen' into their threads (I know, this is an instance of neglected maintenance). I really like ...
2
votes
1answer
189 views

Modify geared hub to fit a 110mm frame

I have a kids' 18" bike with a fixed gear and a coaster-brake. I would like to replace the rear hub with a (preferably 3-)geared hub with a coaster brake as it is the kind of brake my kid is most ...
0
votes
1answer
161 views

Overmountain bike to downhill bike

I have a overmountain bike (Cannondale Trigger Lefty 27.5) with 140mm travel but I was wondering whether I can make a downhill bike out of it because I really want to ride downhill. The shock I have ...
2
votes
5answers
451 views

Croozer bike trailer optimalisation for less tire detoriation

We love to travel by bike. Last summer we did a trip of about 650km on mostly asphalted roads (with quite some medium long climbs and descends) with our son in a bike trailer (type Croozer, see ...
2
votes
3answers
858 views

How hard is it to remove a European-style rear-wheel ring lock?

I have an old Breezer Uptown 8 with a European-style ring lock on the rear wheel. I am thinking of removing it. Does anyone have experience doing this? Is it as easy as unscrewing a bolt? It looks ...
1
vote
1answer
87 views

Recessing Look Cleats

A lot of SPD shoes (not SPD-SL) have the cleat recessed into the shoe so you can walk with it. Has anyone found a way to get Look Keo cleats to be recessed so they are better for walking? I suspect ...
3
votes
3answers
4k views

How can I use a bent seatpost to move my cruiser's seat farther back?

I realize this isn't everyone's taste, but indulge me for a moment... I just bought a beater cruiser bike on craigslist, and I'm trying to move the seat farther towards the rear of the bike for a ...
4
votes
2answers
979 views

Weed-eater bike conversion - Safe rpm?

I've recently started working on retrofitting an old bike with an even older weed-eater engine. The engine will sit atop a bicycle rack and directly drive the rear wheel tire (engine has a built-in ...
9
votes
1answer
6k views

Disabling back-pedal brake

I have a bike with the so-called back-pedal brake, but since it's for someone who's learning I think that it's more an obstacle than an advantage. Since the bike also has hand-actioned brakes, can I ...
4
votes
2answers
392 views

Which brake is most expendable?

I'm thinking of removing a brake(front or back) to reduce weight and simplify my bike. Which brake is most expendable? Its your average fixie road bike.
0
votes
1answer
596 views

How to change a Gary Fisher Kaitai Dual Sport to be faster on the road?

I have a Kaitai dual sport and I love the bike however, I find myself doing a lot more road riding than off road riding and am looking for things I can do to the bike that will help road rides. I ...
10
votes
6answers
6k views

Do stickers or paint compromise a helmet?

Would sticking stickers on a helmet or painting them etc make a helmet less useful in a crash? Not knowing the science of helmets but perhaps stickers in the wrong place might make it not behave how ...
7
votes
4answers
11k views

Is it possible/sensible to add a suspension fork to an old mountain bike?

I have a ~1993 Giant mountain bike. It's not great, but I am a very new and casual rider. The bike has a solid fork and it makes for the predictable rough trail ride. The trails are generally ...
1
vote
2answers
1k views

Is it possible to reverse cable direction in Shimano M770 shifter?

I tried to set up the perfect shifter + derailleur. For the last part it is better (for me) to have low-normal version, because reducing gears is essential for me (I bike mostly within city). So I ...
8
votes
3answers
6k views

What is the impact of changing to a smaller chainring?

My road bike has a Campagnolo Veloce gearset. It's running 53 and 39 tooth chainrings. I have a 13-25 10sp cassette. I find that a lot of the time when I'm cruising, I'm on the big chainring and in ...
9
votes
4answers
686 views

How to weight pedals?

I have some odd kind of track pedals on my bike. I believe they are clipless pedals; but for description, on one side they are flat and comfortable to pedal with. On the other side there is a raised ...
17
votes
6answers
7k views

How do I change a road bike into a commuter bike?

I have a road bike that I commute to work on, just a 9km trip each way. I also have some tightness in my lower back, especially since I usually sit in front of a computer screen. My wife wants me to ...
7
votes
1answer
320 views

How to make my wife's bike lighter? Is it worth the cost?

We inherited a Huffy Stone Mountain 26" mountain bike. We live on the 3rd floor of a walkup. It is quite difficult for her to carry the bike up and down the stairs. It has a fork with a spring ...