Questions tagged [modification]

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21
votes
6answers
10k 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 ...
13
votes
1answer
24k 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 ...
12
votes
3answers
3k views

can only use right hand to brake reliably, due to disability - safer/possible to modify bike?

I'm new here and hoping someone might have thoughts on this - had a look and couldn't find an answer elsewhere! Apologies for the kind of long question, and if it's silly, but any thoughts would be ...
11
votes
6answers
14k 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 ...
11
votes
4answers
2k 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 ...
11
votes
2answers
4k views

Can I modify a slightly too big bike?

A couple of months ago I went for a professional bike fit on a jig. They were struggling to find a bike to fit me perfectly (5ft1 female). They ended up ordering me a cyclocross bike. The bike has ...
11
votes
3answers
11k 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 ...
11
votes
4answers
3k 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 ...
9
votes
4answers
3k views

Can I safely drill a hole from the crown into the steerer in my carbon fork?

I want to install dynamo-powered USB charging apparatus inside my fork steerer. However, it's a carbon fork that has no exit at the crown for the dynamo wiring. Is it safe to drill a small hole (at ...
9
votes
4answers
35k 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 ...
9
votes
3answers
900 views

Modification for cycling with one functioning hand

My dad loves cycling, however he has dystonia which reduces control of the muscles in his hands. He can still cycle, however this becomes very painful after a moderate period of time due to gripping ...
7
votes
1answer
389 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 ...
6
votes
1answer
421 views

I want a bolt on crank, but dunno what terminology to use to find one

I want to place a crank on a bike at a different location than the one the bike is originally located. This is similar to what i want to do, this is an addon crank for a smaller person to pedal with a ...
6
votes
2answers
1k views

Can and should one install rivnuts into an aluminium frame?

I have an aluminium frame, and would like to add another bottle cage. But there are no mounts below the downtube. I've installed rivnuts into a steel frame before, which worked well. Can I install ...
6
votes
1answer
470 views

Modify a front derailleur cage to allow for non-round chainrings like Biopace or Rotor?

I am repairing my road bike after a mishap where it swallowed the rear derailleur around the cassette and into the front derailleur. As part of the rebuild, I'm swapping out the badly worn old ...
5
votes
4answers
4k views

Is it possible to convert a suspension fork to rigid by drilling it?

I have been given a Falcon MTB. I've sorted out all its troubles but the front suspension fork is worn. When using the front brake the slack in the tubes make them judder. Is there anyway I can "...
5
votes
3answers
953 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 ...
5
votes
1answer
1k views

Derailleur On A Single Speed

Earlier today, I saw this bike with an absolutely bizarre drive-train. It looks like a single speed, but it has a derailleur on attached to it. The derailleur does not move horizontally, but only ...
5
votes
4answers
851 views

Downgearing with a road triple

My mother is trying to get back on her bike after years of knee problems + surgery, which so far has gone ok, but she has had some trouble with climbing hills. She's thinking that she should try to ...
5
votes
2answers
2k views

Is it possible to increase maximum seatpost insertion length by filing down a seat tube bottle cage mount boss?

I have an aluminum MTB hardtail frame with a pair of standard bottle cage holes on the seat tube. I want to insert a seatpost fairly deep into the frame sometimes, so that the saddle stays low. The ...
4
votes
2answers
470 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.
4
votes
3answers
11k 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 ...
4
votes
1answer
303 views

Identifying small, moped-like bike

I found a very cool and bizarre-looking bike in Berlin (in Germany) and was very confused about what it in fact "is"; Has anyone got an idea? — To me, it almost looks like some sort of ...
4
votes
3answers
17k 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
3k 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 ...
3
votes
6answers
2k 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 ...
3
votes
3answers
9k 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 ...
3
votes
4answers
135 views

Shave 1.85mm off to get an 11s road cassette onto a 10s hub

Does anyone have experience removing material to get an 11s road cassette onto a 10s hub? As per the hub standards, the difference between the width of a 10s and 11s freehub body is 1.85mm. The back ...
3
votes
1answer
604 views

Am I too tall to bother modifying my old trek?

I bought an old Trek 500 series road bike a couple months ago and have put love and parts into it but it's just too damn small for me (I'm 6'4"). All the post adjustments are at their safest limits. ...
3
votes
2answers
107 views

Sunglasses fogging on cool bright mornings - can I improve airflow?

My favourite riding sunglasses are my Bollé Mamba II safety sunglasses - they're light and wrap around properly while being by far the most comfortable ones I've found. They're also cheap. There ...
2
votes
3answers
744 views

How can I DIY a smaller Anything Cage/Versacage, or a mini bottle cage

In my perpetual quest to carry ever more stuff without panniers, I'd like to fit a second bottle cage under the downtube, for small bottles (e.g. 200 ml of stove fuel). There's space for ...
2
votes
1answer
540 views

Can regular bike forks be modified to allow front drivetrain setup?

Can regular bike forks be modified to allow front drivetrain setup? Some bikes have front drivetrains instead rear drivetrains. The problem is that bike stores don't seem to carry forks that have a ...
2
votes
2answers
240 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
217 views

Bike modifications against side winds

I am cycling on the highway these days, dealing with tremor of my handlebars or a slight loss of control resulting from either oncoming vehicles or the high winds. I'm wondering how pro cyclists ...
2
votes
3answers
3k 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 ...
2
votes
1answer
249 views

Road bike commuting

I have a road bike (Orbea Aqua T23) on which many of the components are coming to the end of their lives. As such I'm replacing most of them, and was wondering what people thought were good mods to ...
2
votes
1answer
2k 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 ...
1
vote
3answers
113 views

Budget brands for gears in India [closed]

A total newbie here. I'm planning to upgrade a single speed to geared one road/tour bike. I haven't decided the gear system though. I guess I'll decide that upon availability of the parts. Well, I ...
1
vote
3answers
3k views

Relation formula between fork length change to headtube angle and bottom bracket height

As we know, changing the fork length will change bike geometry a bit. For example, increasing fork travel by 10 cm will make the headangle slacker and raise the bottom bracket. I consider to increase ...
1
vote
1answer
1k views

Pedal assist sensor possible for front wheel motor on ebike?

I'm looking into converting my current bike into e-bike. I run with IGH, so the only place for the motor is the front wheel. Is it possible to have pedal assist sensor (PAS) with this setup? I.e. no ...
1
vote
1answer
898 views

Convert city bike to road bike [duplicate]

I have a city or normal bike and I want to ask, that with the necessary modification except the frame, is possible to convert this bike in a road bike?
1
vote
1answer
216 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 ...
1
vote
1answer
158 views

Durability of Seat and Chain Stays on steel frame touring bike

I've been toying with the idea of mounting a dynamo on my REI touring bike. Model is ADV1.1 and it has a steel frame. Dynamo attaches by a mechanism that clamps onto a seat stay and tightens with two ...
1
vote
1answer
744 views

Bought a Vintage Bianchi 1985 road racer, came with Shimano 600, can I easily turn it into index shifting?

As my title says bought a: Bianchi 1985 vintage in almost mint condition Shimano 600, 12 speed (2x6) with freewheel, friction shifters I'd like to turn it into an index shifter. Do I just swap out ...
1
vote
1answer
155 views

Modifying SKS Race Blade Long for solid axle hubs

I have a set of SKS Race Blade Long fenders. They have quick release attachments that fit around QR skewers. Unfortunately, I'd like to set these fenders up on my single speed commuter which has track ...
0
votes
1answer
133 views

Slamming my stem considerations

I want to try a slammed stem but don't want to cut the steerer tube. Do I have to?
0
votes
4answers
3k 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 ...
0
votes
1answer
2k views

Finding the right size wheel for a electric bike kit [closed]

I want to convert my trek cross bike to a electric bike. I have 700c rear tire. The kits wheels seem to come in inches. What should I do?
0
votes
1answer
108 views

How can I shorten the frame of a "Duchie shopper" bike?

The cycle is a "Duchie shopper". The bike is to big for my wife. Is it possible to shorten it for her? She is 5 ft (152 cm) tall. The bike has a 27 inch wheels. I want to shorten it by ...
0
votes
1answer
275 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 ...