All Questions

Filter by
Sorted by
Tagged with
0
votes
0answers
3 views

What are the typical range of maximum braking forces?

There are some good references for the maximum deceleration which can be reasonably attained by a bicycle. It seems that ~0.7g is a typical value. However, this does not address whether the brake ...
0
votes
0answers
3 views

Aluminium front and Carbon rear wheel on hardtail?

I recently got a used hardtail. (specialized epic elite) It's got roval sl control 29.. which is pricey... The front has 24 spokes and back has 28 spokes. Now I want to install a dynamo on it. and ...
0
votes
1answer
14 views

Which type of course is the fastest for a 10km TT? A completely flat course or a course with 5km uphill and 5km downhill?

There are 2 types of courses that I am considering for a 10km trial: Completely flat. 5km out, 5km back. 5km uphill at a grade of 1%, 5km downhill on a grade of 1%. Assuming you start and finish at ...
1
vote
2answers
31 views

How to make a 10 year old electric bike great again?

I have taken a 10 year old electric bike out of the garage a few weeks ago after not having used it for multiple years. The bike is an elops 7 bought at decathlon with a geonaute battery. It still ...
1
vote
0answers
56 views

To buy this damaged carbon bike or not?

I'm looking to get an MTB and have been looking for this particular one for quite a while but stock is hard to get hold of. I managed to find one in a store but the bike is damaged unfortuntely and ...
1
vote
0answers
20 views

How can I remove very stuck headset spacers (alu/carbon)

Working on a bike that has had significant indoor turbo usage, (i.e. a lot of sweat has run down the headset) and corrosion has bonded the aluminium spacers to the carbon steerer. The steering is ...
1
vote
0answers
47 views

which motor is used to change gears in automatic gear shifting cycle now-a-days?

I am doing a project on automatic gear shifting. I struck up in a place where which motor will I be supposed to use to change the gear. How much amount of power that the motor requires to hold the ...
0
votes
0answers
15 views

What size of tyres can I use on my BTwin Original 5? [duplicate]

I own a hybrid, BTwin Orginal 5 which is almost 5 years old. Lately I've been doing a lot of road cycling. This bike comes with 700x42c ISO 44-622 size tyres which weigh in around a kg per pop. I wish ...
6
votes
2answers
832 views

I have slipped off my bike 3x in the last 2 months - will changing tyres help?

Recently picked up a used Boardman Hybrid Team and it's my first bike after several years on boris bikes in London. I was doing great in the summer but recently have slipped/skidded 3 times in last 6 ...
0
votes
1answer
70 views

Triple Chainset

Trying to replace my 52/42/32 front 21 speed chainset with same. The outer chain ring 104bcd 52t would also be OK. Unable to find. This is for an English trike.
5
votes
2answers
629 views

Rear derailleur at limit, chain still rubbing

I gave my bike a thorough service recently by pulling it apart and cleaning/re-greasing everything. Now everything is back together and I just can't get the rear derailleur to work properly. The H ...
5
votes
4answers
339 views

Using a chain-type oil filter wrench as a chain whip

Long story short, I need to remove the rear cassette on my bike. The cassette is a pretty basic Shimano one, and the drive shaft bit I bought a few years ago looks like it also fits the lock ring. ...
4
votes
2answers
201 views

Wearing short sleeved merino by itself?

I heard merino is for cool-cold days. Maybe I heard it wrong. Then I thought people use it for baselayer (something you wear under your jackets). But it seems it's not the case based on some reviews/...
0
votes
1answer
102 views

Importance of spoke count for touring?

I bought a used bike which has 24 front spoke and 28 rear spoke. I'd like to use this bike to go Tour divide. Do I need more spokes on front? I'd like to setup a dynamo system, I see there are not ...
1
vote
3answers
46 views

When basic maintenance for basic Suntour XCM/ XCC fork is needed?

When basic maintenance for very basic Suntour XCM/ XCC fork is needed? Is it needed just in case if something wrong or once a year or after some amount of km? By maintenance, I mean something like ...
3
votes
2answers
351 views

App for displaying 30s rolling average power

I use a power meter without a dedicated cycling computer like Garmin or Wahoo, I prefer to ride with my phone on the handlebars. I found a couple of cycle computer apps which can be paired with the ...
2
votes
0answers
67 views

Normal MTB trigger shifters and hydraulic brake levers on a bullhorn handlebar

Was wondering if mounting Altus shifters and hydraulic brake levers on the vertical sides of a bullhorn handlebar would work or would be possible? I tried holding one of my grips on my flat bar while ...
0
votes
0answers
67 views

Does using spacers on one side of the frame help stop a rear wheel rub?

It looks like I have a little room on the rt side on my rear wheel. So could I put a spacer on the left side to even the gaps? thanks
0
votes
0answers
72 views

Cleat tension is too high

I've been using SPD pedal (PD-EH500) with SH56 cleat I just got a new pedals (XTR 9100) and adjusted the tension to the lowest setting. I find it very hard to remove the shoes from the new pedal even ...
5
votes
1answer
546 views

Bike seat tube is messed up

I was testing my seat and as I was sitting on the bike on the highest level of the seat post. My seat post came off and bent my seat post, so I ordered another, but now my seat tube doesn't allow my ...
-1
votes
1answer
78 views

Mountain bike tyres, could somebody explain what the markings mean?

I have just bought new all terrain mountain bike tyres. On the tyre wall it says: inflate to 280kpa (40 psi), MAX LOAD 75KG (165 LBS). Could somebody explain, and could somebody tell me what my ...
24
votes
3answers
5k views

What is the purpose of whipping a bike?

What is the purpose of "whipping" a mountain bike during a jump? Is it merely a trick (show off) or is it a functional move with a purpose? It is very commonly seen in videos which made me ...
3
votes
2answers
542 views

Why have MTB tyres with strong front / back design disappeared?

Back a few years ago was easy to find tyres with a particular design based on their position, back or front, see this sample image fron a pair of Nokian Boazobeana: Riding with those was pretty nice, ...
4
votes
3answers
202 views

What previous Shimano road shifters are 10sp and exit cables under bar tape?

I'm swapping out some parts on an old road bike I have to build it up as a winter/less cared about run around. Looking for what I can on auction sites etc., but the model numbers elude me. I have a ...
0
votes
3answers
91 views

Left crank has become loose and no longer stays on the bike

The left crank kept falling off and I've kept on managing to put it back on but finally it wouldn't go. Think the threading is just absolutely kackered. So I ended up taking it to a shop to have a ...
2
votes
1answer
106 views

Flat Pedal Pin Installation

Do you have to screw flat pedal pins in all the way, or can you make them longer by leaving them screwed out and using a thread locker?
1
vote
1answer
54 views

Shimano Di2 Bleed Screw problem

My bleed screw has become damaged and I need a new one. My shifter is Shimano R8070 which according to the spec, the part number should be Y00898030, the screw turned up but it is too small, as in the ...
2
votes
2answers
169 views

Which size SKS Bluemels will fit my frame - 35, 42, 45?

I'm thinking of getting full mudguards for my road bike, the Triban RC 520 , (details here) , and the manufacturer's page tells me that it comes with 700 x 28 tires and the frame is compatible with ...
0
votes
0answers
56 views

Is it possible to upload ZWO file on Android?

Zwift Workout file (*.zwo) can be manually added to custom workouts on PC, Mac and iOS. It is as simple as copying file to a specific folder (e.g. /Documents/Zwift/Workouts). But where is the location ...
0
votes
1answer
54 views

Tektro HD-M290, change to a dropbar lever configuration. Which levers are compatible?

I want to change my cowboy flat handlebar to a drop bar. I have Tektro HD-M290 brakes and I'm searching for a compatible model of drop bar levers. The bicycle has automatic speeds, so I just need ...
2
votes
0answers
32 views

Removing the crank arm (square taper) on a Chinese (PooBoo D 577) stationary bicycle

In trying to remove the crank arm, I found that the threaded "business end" of the standard crank arm puller has a smaller diameter (1-2 mm) than the crank arm opening, so there is no way to ...
0
votes
1answer
118 views

Best solution for additional (dual) battery for E-bike

I've marked a few possible places for additional battery mount. What do you think is the most reliable place to mount battery in terms of ergonomics of the bike? Also, how to ensure the parts are ...
2
votes
2answers
87 views

Gates Carbon Drive single speed shows inconsistent tension

I recently noticed an issue with my Carbon Drive bike where pedaling was difficult at a certain point of rotation for the crank. Within about 30 degrees of movement of the crank, the tension on the ...
2
votes
4answers
182 views

Styles of Shoe Covers for Colder Weather

After getting this pair of shoe covers, I'm wondering whether this style of closure (zipper behind the foot) is reasonable. I suspect that after the inevitable bit of walking on grass and asphalt, ...
0
votes
0answers
60 views

Locating the bicycle manufacturer

I have purchased a fold-up all-terrain mountain bike serial # LDR15080363 that I would like to restore to the manufacturer’s specifications. Unfortunately, I have been unable to confirm who the ...
0
votes
1answer
60 views

Brompton cable & housing replacement

What type of cables & housing should I buy to replace them on my 2016 M6R Brompton? I've put a lot of tough miles since I bought my Brompton, and one of my shifting cables finally frayed and fell ...
2
votes
1answer
80 views

Headset standards: EC29 vs EC30

TLDR: Can I wedge an EC30 into what seems to be EC29 (29.8mm) I'm in possession of a mid-90's frame with a: Head Tube Inner diameter of 29.8mm (Which seems to class as EC29) Threadless Steering ...
4
votes
2answers
517 views

Can I use mountain biking cleats on a road shoe…?

I have an older pair of road shoes that appear to support both two-hole and three-hole cleat systems. I've attached a two-hole Shimano mountain bike cleat to them and gone for a very short ride to ...
9
votes
0answers
83 views

White graphite (hBN) a worthwhile chain lube?

Hexagonal boron nitride, a.k.a. white graphite, is non-toxic, very very slippery, tends to stick to metal, tends to not have other substances stick to it, and seems to have worked very well in my ...
-1
votes
1answer
59 views

Standard or specification for diameter of valve stem holes

I have a rim with a Presta valve hole, but I would like to drill it out to fit a Schrader valve. Is there a specification for how large the hole should be? I want to be sure the hole isn't too big, ...
0
votes
1answer
49 views

Shimano Claris 1x8 11-28t, can upgrade to 1x10 11-34t?

Is it possible for my bike that I'm using Shimano Claris 11-28t 1x8 speed to upgrade my cassette in 11-34t 1x10 speed? Thanks. hoping for a good advice.
0
votes
1answer
32 views

I have a Dahon Mariner, can I replace 20x1.6" tyre with 20x1.79? [duplicate]

I have a Dahon Mariner Bike. Can I replace a 20 x 1.6" back tyre with a 20 x 1.79" tyre as I can't get hold of a 1.6?
2
votes
3answers
243 views

11-speed cassette, freehub and wheel compatibility

I have two wheels and two 11 speeds cassettes. With one combination of cassettes and wheels, shifting is reliable. With the other combination, the position of the cassette relative to the derailleur ...
11
votes
2answers
2k views

Why the backwards fork?

While reading this Wikipedia article, I noticed some photos of racers, all from the early 20th century, riding bikes with the forks installed backwards. I count at least 3 of them, so it wasn't just a ...
11
votes
7answers
4k views

Is there a way to share a tight staircase/steps with pedestrians?

One of my destinations in the city has a peculiar access route - I need to descend a very narrow set of steps, a staircase, which has barely enough space to let two pedestrians pass. I'd estimate its ...
0
votes
1answer
82 views

Advisable to switch from 38 mm tires to 28 mm?

I have a urban/hybrid bike ( Riverside 500 that came with 38mm tires that I don't really have complaints with except some visible cracking since a year or so (which hasn't impacted feel, air retension ...
0
votes
1answer
38 views

Trek 520 (2021) saddle dimensions

Does anyone have dimensions (width) for the stock saddle that comes with a Trek 520 2021 model? The Trek website simply describes it as "Bontrager Evoke"
0
votes
1answer
47 views

Which replacement pulley wheels fit a Shimano RD-6400/6401?

I'm looking for replacement pulley wheels for my RD-6401. It needs to have 10 teeth and a thickness of about 7.2mm. I do have a set of Shimano 10 teeth pulley wheels in front of me (Y56398030) which ...
3
votes
2answers
117 views

Buying Cervelo P2 vs P-Series [closed]

I'm looking to buy my first tri bike and am considering between a Cervelo 2016 P2 (rim-brake) and the new 2021 P-Series (disc-brake). The P2 is brand new, but it's an old stock my LBS has on hand, and ...
2
votes
1answer
88 views

How to install dynamo hub into mtb

I have a roval carbon wheel on specialized epic hard tail. I want to install son dynamo hub on it. I've seen it done on https://bikepacking.com/plan/lael-wilcox-2019-tour-divide-gear-list/ (SON 15mm ...

15 30 50 per page
1
2 3 4 5
322