1
vote
2answers
125 views

How much pressure can mountain bike tires take?

I am thinking of buying a new mountain bike, but I'm unfamiliar with mountain bikes. That's why I need to be well aware of the pressure a mountain bike can handle. How much pressure can mountain bike ...
0
votes
0answers
41 views

How to polish carbon frames?

My carbon frame has some slight scratches and some black gunk around the seat stays. What is the best way to polish the frame to bring it back to its original appearance? I was thinking of using a ...
0
votes
1answer
51 views

Do I need to replace 10 speed chain if using a bigger cluster, also 10 speed?

Most similar questions are asking about using the same chain with a bigger cluster with more gears (10 speed chain vs 11 speed cluster). My concern is being able to simply buy a higher gear ratio ...
0
votes
3answers
94 views

Calorie burn information is dramatically different between Strava IOS App and Cyclemeter IOS app. Which is more accurate?

I use Cyclemeter to track rides on my iPhone 6, then when the ride is over, I send the info to Strava. When I look at the ride in Strava the calculated Calories burned for a 17 mile 90 minute ride is ...
0
votes
1answer
59 views

Help me understand bottom brackets and cranks

I have a Norco Threshold cyclocross bike (http://www.norco.com/bikes/road/cyclocross/threshold-carbon/threshold-sl-ultegra/) . It has a PF30 bottom bracket and an FSA Energy Cross PF30 46/36T crank. ...
1
vote
1answer
84 views

Do Carbon Wheels Stay True Longer Than Aluminum Wheels?

Does a race quality carbon wheel set stay true longer than an aluminum one (with equal abuse/mileage) ? It seems like the properties of carbon would resist flat spots and warping better than ...
0
votes
0answers
53 views

I have a trekking bike. Should I buy a road bike to train for a race?

I have a trekking bike (similar to this one : http://www.hervis.at/products/product?code=BASE:1842986&referer=at-bike-cross ) and I plan to join some triathlon events in the future. I try to do ...
1
vote
1answer
38 views

How similar are saddles made by the same company?

I have a Specialized Phenom on my mtb that is very comfy and a Specialized saddle (standard one from an Allez) that I use on my commuter bike which is also comfy. The Selle Italia saddle that came on ...
2
votes
3answers
76 views

“Footprint” of the Park Tool PCS 9 stand

I am trying to workout whether the park tool PCS 9 workstand would fit in my bath tub (it's the only place I can clean my bike). To do so I need to know how big the footprint of the stand is. Could ...
1
vote
2answers
59 views

Locking a vehicle bicycle rack

We are planning a trip with a bike rack attached to our trailer hitch. What is the best way to lock the bikes while the vehicle is unattended? I see some racks have locks on the knobs but they don't ...
0
votes
1answer
23 views

Can I fit v brakes on 2003 Marzocchi MX Pro Suspension Forks

I've got some very similar forks to this and I want to know if I can use v brakes with them. It looks like there is a thread to screw in some bosses, but I'm not 100% sure.
0
votes
0answers
55 views

Single speed conversion kit

I have an old Battaglin road bike from 1997 that I want to convert to a single speed. My issue is; what conversion kit to buy? The rear hub spline (not sure this is the correct term) has a 4x4 ...
4
votes
1answer
140 views

How to prevent accidental unclipping while cornering?

I have less than 10 hours on SPD pedals. Unclipping is becoming more and more intuitive (I no longer fall to the side when stopping at a traffic light). While it still intimidates me to jump with ...
0
votes
2answers
59 views

cable too short to reattach into a sturmey archer 3 speed shifter

I've just been given a Rayleigh Chiltern. The only problem is, the cable has unattached from the gear shifter. I Googled how to re thread, but the cable isn't long enough at the top end to slide right ...
1
vote
1answer
145 views

Could someone help me identify this bike?

I would much appreciate it if someone could help me identify this bike? The decals says Viner, but I think the bike is from a different manufacture. Here are some images:
5
votes
4answers
1k views

Is having a disc brake on a single speed bicycle a bad idea?

I talked to a bike shop that sells a lot of fixed/single speed bikes. I asked them if they could sell me a single speed with a disc brake on the front. The guys said no because: It will be hard to ...
0
votes
1answer
72 views

What accommodations might be made for riding a frame 4'' too large?

I have been offered possession of a very old and interesting bicycle, made in 1933. It appears to be in quite good condition, and has a lot of interesting history. However, it features a 26'' frame, ...
-1
votes
2answers
59 views

Seat post tightening

I have a giant defy 3, I'm not sure how tight the seat post bolts should be? I don't have a torque Allen key. Is doing the two bolts on the ring that goes around the frame as tight as I can do them ...
2
votes
2answers
45 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 ...
0
votes
2answers
191 views

what power did alex dowsett put out during his hour record?

Alex Dowsett recently set a new world hour record of 52.937 kilometres, how much power did he have to produce for an hour to be able to achieve this feat?
-1
votes
2answers
144 views

How did this happen to my chainring?

So, this happened. All of this group of bolts but the one you see came out of my crankset: My question is.. how exactly do all those bolts wriggle themselves loose !? How do I determine what ...
0
votes
0answers
21 views

shimano 105 brake/shifter won't move under tension

When I tension the cable normally the shifter won't move. With very little tension on the cable it will tick as normal. Any idea what could be wrong? Is it reasonable to try to repair it, or is ...
0
votes
1answer
121 views

Do pedal-driven bicycles exist that can handle highway commutes?

Do pedal-driven bi/tricycles exist which can be driven at highway speeds without fuel or electric drive assistance? Assisted brakes, steering, lights, and amenities such as climate control or ...
0
votes
0answers
69 views

Weird gyro effect while riding

I have an old threaded headset and quill stem. Recently I overhauled the headset; replacing the bearing sleeves with loose bearings (filled to max and removed 1 bearing). The stem was also found to be ...
0
votes
1answer
50 views

Rear cassette 'ticking' forward, making chain catch, what is the problem and how do I solve it?

I have a Giant Rapid 4, bought in 2009. When freewheeling (i.e. rolling forward but not pedalling) on my bicycle, the chain catches. I had a look and I think this is because the rear cassette ...
0
votes
2answers
28 views

Replacing my bottom bracket. I need help IDing a replacement

So I have owned a Swhinn Network 3.0 (21-speed. Square tapered BB. All aluminum) for almost 5 months, and at about month 3 the bottom bracket started giving me some noise. I work in a bike shop on my ...
1
vote
2answers
59 views

Would rim brakes help a slightly bent rim?

After recently falling and bending the rim a bit I was wondering if forcefully applying the brakes while in motion help it straighten a bit? Might be my imagination but it seems much truer than ...
0
votes
1answer
44 views

Tyre suddenly gets tilted

Hey guys i have a simple cycle .It do not have gears in it but today while cycling , my rear tyre suddenly gets tilted towards right hand side . One of the , the upper side is tilted towards right and ...
3
votes
3answers
109 views

Best kind of bicycle for lower back issues?

I've ridden bikes all my life. Now nearing 50, for the past year or two I've noticed that when I ride over 20km or so, my lower back gets extremely painful - enough to make it not possible to ride. ...
3
votes
4answers
200 views

How accurate is the 'calories burned' figure on my GPS device?

I use the Garmin Edge 200 to record the route, distance and speed of my rides. It also gives me a prediction of the amount of calories I have burned on any particular ride. The only data I have ...
3
votes
2answers
193 views

average cycling speed 12km/h

I am now in training for cycling. Long time didn't got into bike. I am using a 21 gear mountain bike with highest gear, and around 70 - 80rpm. What's surprise me is my average speed only ...
3
votes
1answer
203 views

Road Bike Tire Throwing Rocks

I recently purchased a road bike after having ridden a dutch style bike for over a year and a half. The roads that I ride on have the usual gravel and dirt on them but every now and then my road bike ...
1
vote
1answer
99 views

how to use “smart valve” pumps?

i got one floor pump with a so called "smart valve". it came with no instructions whatsoever. and I'm not smart enough to use it... I tried it on both type of tire valves, and no matter what i do, it ...
2
votes
1answer
47 views

Bike commuting on the Captial Crescent Trail in Washington DC

I am moving to the Washington DC area and will be working in Bethesda at the NIH. It looks like living in/near Georgetown and commuting out on the Capital Crescent Trail could be really nice. I was ...
0
votes
2answers
80 views

Bicycle saddles

I was looking at a few options as replacement to my bicycle saddle. I have seen these used majorly with roadbikes than MTBs, but I didn't understand in what sense these should be preferred over the ...
4
votes
3answers
104 views

Best way to mount a big backpack to rack?

Title says it all. I have a 65L backpack and would like to mount it on bike rack so it's most convenient to ride with and doesn't catch much air friction. Currently I'm doing this (sorry for the bad ...
0
votes
1answer
107 views

Is my six-year old touring bike worth repairing?

My touring bike (which I use for commuting) needs repairs which will cost £200... half the price of a new one. I am not mechanically-minded.... and I am too busy and too old to learn! A new bike ...
0
votes
2answers
78 views

Upgrading a Specialized Sirrus 2015?

Not having biked since I was a kid I went ahead and bought a Sirrus 2015 (the base model) for commuting 2x a week (~100 km weekly total) with a view to do 3-5 days. I've done about 1000km on it so ...
0
votes
1answer
27 views

ask about size and how to solve it [duplicate]

i just bought and build a BLB classic frameset. size 53 and im using 700x28c wheelset. but after that, my toe clip touching the front wheelset especially when i want to turn right or left. please help ...
0
votes
1answer
70 views

If many bottom-outs are happening, should air pressure or compression damping be increased?

I know springs exert a force proportional to displacement from a steady-state position. On the other hand, an ideal damper exerts a force proportional to the speed of the object. The procedure to ...
0
votes
0answers
123 views

Backpack advice?

I have a Camelbak Kudu 12 (http://shop.camelbak.com/kudu-12/d/1344) backpack. I've tried riding with it a few times but it's just not working. Whenever I ride down a trail, the backpack hits the back ...
2
votes
1answer
124 views

What's wrong with my tire?

My back tire caught a flat from a pot hole. The next day I take it to a shop and I get an inner tube change. From the shop I ride the bike home, but the tire catches another flat on the way. What do I ...
0
votes
1answer
49 views

Scott S30 road bike 11speed with 10 speed compatibility

I have a Scott S30 bike currently running a shimano 105 2x10 speed 50-34 crankset, shimano 105 10 speed front shifter and 10 speed cassete and chain. I have a new crank that i want to install, the ...
0
votes
1answer
125 views

bike keyhole broken

I had parked my bike outside my local grocery store and when I came out I saw that my lock had been tampered with. The keyhole where I insert my key was broken in half and the rubber coating was also ...
1
vote
1answer
51 views

Praxis Bottom Bracket Performance on BB30 Frame

I'm looking at upgrading the crank (stock FSA to Force 22) and getting a Praxis BB for my Cannondale CAAD10 BB30 frame. http://www.praxiscycles.com/product/conv-bb-sramgxp-isis-2/ It seems like ...
1
vote
1answer
78 views

Saddle for big guy

i am 6ft, 250 lb. I have a karate monkey bike from surly and recently begun to ride the bike. My main aim is to lose weight and get stamina. I try to ride daily for 30 mins, around the block, on the ...
1
vote
4answers
131 views

Should the hands be used for absorbing the impact after a jump?

I am trying to learn some very small jumps and bunny-hops. It seems that upon landing from either, there are two options. I am talking here only about the moment of the impact with ground, and not ...
0
votes
2answers
50 views

Sourcing Shimano Di2 6770 Parts

Can anyone tell me where I can source a Shimano Di2 Ultegra 6770 rear derailleur since shimano no longer has replacements and left their customers high and dry?
0
votes
2answers
70 views

What's the difference between Fulcrum Racing 3 and Fulcrum Racing S3?

I'm able to buy a set of Fulcrum Racing S3 wheels. I searched in all their on line catalogues but the wheels in the picture the guy send me are nowhere to be found. I'm thinking these are exclusively ...
1
vote
3answers
75 views

Post race analysis of performance

So I did my first bicycle race this weekend. The watts graph was very varied, there was a lot of low watt (150-200w) and short bursts of +400w. I would like to know how many bursts there where, and ...

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