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Questions tagged [mountain-bike]

Mountain bike (MTB) can mean almost any kind of off-road bicycle. Wide knobby tires, flat handlebars, maybe shocks, probably a sturdy frame...

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4 votes
2 answers
5k views

Can I switch to a new type of bottom bracket?

The bottom bracket on my MTB (Cube Analog '17) needs to be replaced, my local bike shop said he didn't have the required piece: a square bottom bracket 115 x 73mm. Since I can't find this type of ...
1 vote
1 answer
134 views

Bike pedaling makes cracking noise under middle or high load

Can this be related to bottom bracket bearings of Race Face BB92, PressFit? The chain is freshly lubricated and quite a new one. No noice is produced when pedalling with low load or not pedalling. ...
7 votes
2 answers
554 views

Power pedals on a fully MTB (riding flat roads), later on road/gravel bike

(Before closing as duplicate, this question is somewhat related but not the same at all: Pedal power meters on off-road / MTB). Background I am an avid runner, and am pondering whether I will branch ...
2 votes
0 answers
65 views

Warped MTB Tyres

I recently bought a used Canyon Spectral, which came with Maxxis minion and highroller 27.5 x 2.3 TR tyres. Both tyres appear to be warped. The rims are fine and I’ve tried installing with several ...
5 votes
1 answer
143 views

How often should I replace my tires on my mountain bike?

I ride a Canondale mountain bike that I bought 20 years ago now. It is in mint condition becuase after every muddy ride I clean it up. There have been periods of time, years, when my bike simply ...
33 votes
11 answers
54k views

Front suspension or full suspension mountain bike

I'm considering buying a mountain bike and have narrowed it down to two models (make and model aren't important for this question). One model is a full suspension bike (front and back), the other is ...
1 vote
2 answers
104 views

Is the framed cracked?

I have noticed this scratch/crack on my canyon exceed cf6 frame. Can I get someone else’s opinion on what they think about it? I have never overtightened the seatpost bolt to more than specified and ...
1 vote
1 answer
113 views

Why only one front chainring for MTB? [duplicate]

Why only one front chainring for MTB ? Is it a short-term trend or it is a must for MTB (XC) ? Is it better than 3x8 or 3x7 (3 front and 7 rear cogs) ? UPDATE: Later I found a very similar question: ...
0 votes
2 answers
121 views

Unlocking iPhone while cycling: face id vs touch id

I currently own an iPhone SE, and have to purchase a new one soon, and costs aside I always preferred touch ID for unlocking the iPhone while on the go, it's one-fewer eye contacts with the phone for ...
0 votes
0 answers
57 views

Help me identify Italy frame

The frame has a Campagnolo carriage. The continuation of the upper pipe is also characteristic. I would be grateful for any advice. The text on the frame is extraneous, ignore it.
4 votes
3 answers
831 views

Technique for Riding a Hybrid Bike on Trails and Switching to Knobbed Tires?

I've been riding a hybrid bike on some intermediate mountain bike trails(at least according to MTB project), and it's been really fun. While I'm not able to "send it" as hard as some of the ...
0 votes
1 answer
823 views

My preload screw doesnt work

The preload screw on my mtb fork is very loose and easy to turn, I have a spring fork. The preload doesn't change even if I loosen or tighten the screw. Any ideas on what could be wrong?
5 votes
1 answer
234 views

My MTB has slightly longer reach for my size

I'm 175 cm (5′9″) tall and have a 26" hardtail MTB. This bike is apparently small for my size because bike manufacturers do not recommend 26" bikes for my height. However I had gotten this ...
2 votes
1 answer
813 views

Which year was my stump jumper made?

It is a 1986 or 1987 stump jumper sport, serial number DS636887. I have the original saddle and all equipment as when purchased. Only the tires are not original.
2 votes
0 answers
369 views

HELP Identifying a vintage MTB frame

I only have three clues: "3.0 Aluminum" on the top tube Serial Number on the frame itself "Designed in the USA" flag decal Can anyone help me identify this vintage MTB frame?
2 votes
1 answer
169 views

How to diagnose and fix a mechanical disc brake rotor that is bent

I have a 2022 GT Aggressor with mechanical disc brake rubbing on the rear wheel. I tried realignment of the caliper several times and I got the wheel trued. But my brakes still rub in one spot. Does ...
3 votes
2 answers
504 views

Is a 0.5-1 cm buckle/bend in a rim repairable?

I have a wheel with about 0.5-1 cm of buckle in it. Is it repairable if I get my LBS to true it? It’s a DT Swiss EX 1700 wheel, so it is a sturdy material, no cracks, one tiny flat spot, barely ...
1 vote
1 answer
249 views

Dropper Post on Marlin 7 Gen 2 (2021)

I am looking to install a dropper post on my Trek Marlin 7 Gen 2 (2021) size XL. I am thinking I want to get a PNW Cascade 150mm. When I went to measure the seatpost to make sure, it stopped before ...
5 votes
6 answers
6k views

Should I use slime-filled inner tubes or anti-puncture lining?

My outer tyres were really worn and my inner tubes had 3 patches each (and still deflating) so I decided that I had to replace both. I have found some pretty nice outer tyres but as the place I ...
0 votes
1 answer
66 views

Im trying to bid on this auction and i took a picture of the storage of the bike and im trying to figure out what it is and if its worth bidding on [closed]

This isnt my storage.this is a bidding unit.what do you think this bike is and its worth?
5 votes
3 answers
916 views

Can you identify this vintage Moor MTB

I've recently acquired this bike: The Moor brand seems to be coming from Denmark. However, the SFMK CSCM sticker seems to be referring tot the "Suisse Motorbike and Bicycle Union". The bike was ...
0 votes
2 answers
188 views

Does it takes longer to cycle a route with a mountain on it comparing to the same distance without a mountain? What is the cause of that? [duplicate]

Imagine you cycle 100km. On one route there is a mountain 100meter high on an other route is not a mountain but a straight way. Usually it takes longer on the route wiht a mountain. One reason for ...
15 votes
6 answers
13k views

Why do I always get punctures in my rear wheel?

I get probably five times as many punctures in my rear wheel as opposed to my front wheel. I run a good pressure and don't get obvious pinch flats. Does anyone have a logical reason why this could ...
1 vote
2 answers
81 views

Occasional weird sounds from rear of bike

Usually when not peddling and going fast (road, downhill) this sound happens It usually stops after peddling (forward or backwards) Any ideas what might be wrong? https://1drv.ms/v/s!ApXgO1jaK-...
1 vote
2 answers
3k views

My bike is making a grinding noise when I ride

So recently whenever I am riding my bike and I push down to a certain point, my bike makes a grinding noise and I can feel the main frame grinding as well, I can't seem to identify where it is coming ...
2 votes
1 answer
227 views

I think my MTB chain is modified ( shortened )

I have a 2x9 crank and cassette system. And I can't get it to go on the last cog because my rear derailer is maxed out. I bought a used and altered MTB and I can see the chain is short. So typically ...
15 votes
5 answers
5k views

Why aren’t Cannondale head shocks used anymore?

Cannondale used to make these shocks for mountain bikes and they were pretty common when I rode as a kid. It seems like they have completely phased them out of production. What caused this? Is there ...
0 votes
2 answers
126 views

How to upgrade Scale 930 to reduce weight and gain speed?

I need to upgrade Scott Scale 930 (2022) with the following properties: fork: FOX 32 Float Rhythm Grip 3 (100mm travel) bottom bracket: Shimano BB-MT500 / shell 41x92mm rear derailleur: Shimano XT RD-...
14 votes
2 answers
2k views

I need help identifying this "Mystery Bike" (could possibly be a real ferrari?)

New UPDATES below!!! Good day to everyone, So i have this really old bike. I don't know its brand and model. The paint is still stock, and it has a Ferrari sticker with the name "Michael ...
1 vote
1 answer
520 views

Running DUB wide crank with 52mm chainline

I have a set of sram xx1 carbon cranks that are DUB wide. My bike (2023 Specialized Epic Evo) is DUB crank 52mm chainline. If I add BB spacers to the DUB wide crank and use a 6mm offset chainring ...
5 votes
2 answers
11k views

Is there a weight limit for my mountain bike (Mongoose 29” excursion)?

I have a Mongoose 29" Excursion Mountain bike. I'm 310 lbs. Is there a specific weight limit for this bike?
5 votes
4 answers
1k views

What bike should I buy if I want to fit a child seat and live in area with a lot of hills?

I would like some recommendations for womens bikes that i can fit a rear toddler seat on to. The reason i would prefer a rear seat is because i am short (5ft 3) and my son is quite tall for his age. ...
0 votes
0 answers
25 views

Confused about tire leakage, valve not attached

I’ve gotten a second hand mountain bicycle (felt brand), now the back tire is leaking air and is unusable. First, I thought that the tube was burst and would need replacing. But now I am just confused ...
1 vote
1 answer
117 views

Clunk/Knock noise when pedaling

I recently bought a new mountain bike and when I pedal, sometimes (almost randomly) I will hear a clunk or a knock come from the bike. It usually only happens once or twice, but I worry because it ...
7 votes
4 answers
26k views

Chain stuck between chainring and frame

My chain fell out while switching the gears and now it is stuck between the chainring and the frame. (I'm not a native speaker nor a bicycle expert, the terms may be wrong) I tried to unscrew the ...
3 votes
3 answers
1k views

Is my shifter numbered backwards?

This may be a noob question, maybe I'm over thinking it. But on the bike I just ordered, when I I move from the smaller to the larger rear sprocket, the dial on my shifter counts down. But on my front ...
3 votes
3 answers
182 views

Which full suspension bike is this?

I got this for $10 from my neighbor, who had it laying around for years. As you can see, the rear shock is gone, but the rest is there. It doesn't have any marks or model name, only a serial number at ...
4 votes
3 answers
363 views

Best derailleur compatible with 1.7 pull ratio?

I want to replace my Tourney 7spd with something else, but my cassette isn't compatible with an upgrade to anything else, so 7spd is what I have to stick with. I know I have to stay within the 1.7x ...
1 vote
1 answer
222 views

My mountain bike has 26 x 2.35 tires on it and I am ordering new 26 x 2.125 tires

My mountain bike has 26 x 2.35 tires on it and I am ordering new 26 x 2.125 tires. Will these be okay to use? What issue might this cause? Or will the difference be negligible?
3 votes
2 answers
129 views

Help identify early 90s Chro-Moly MTB

I have this Chro-Moly bike I bought in the early 90s in Chile branded as Oxford, but I believe the frame is an import. One mechanic said it is japanese, another that it's italian. The rear part of ...
2 votes
1 answer
111 views

New Bottom Bracket grinding/crunching?

I recently bought a new Shimano BB-MT501 bottom bracket and installed it. However, once I put the Hollowtech crankset back in place, when turning the pedals there is a very obvious grinding or ...
3 votes
1 answer
109 views

my ankle get stuck between the downtube and crank arm

I used to own a mountain bike that I truly enjoyed – a full-suspension (Sisku D7). Transitioning from a hardtail, my initial experience with the full-suspension ride was mostly positive, but there ...
4 votes
2 answers
312 views

Low attaching vs high attaching mudguards/fenders on MTB

I am about to buy mudguards for my 29" MTB bike. I will only use them while commuting on wet surface. I considered SKS Shockblade and XBlade set, but noticed they are attached to steering tube ...
4 votes
1 answer
229 views

XTR Double chain set to single?

is it possible to convert a m9100 double chainset crank to a single crank? Thanks Matt
6 votes
1 answer
202 views

Why are MTB suspension shock curves s-shaped

Why are the suspension curves s-shaped, rather than just increasing? I understand that air spring curves will steepen a lot when the residual air volume reduces (curves should have a singularity ...
1 vote
1 answer
130 views

What would you call the cable connection on a Race Face Aeffect R dropper post?

I'm very new to mountain biking, and even newer to bike maintenance. Appreciate your time on a question that I'm sure is simple; I just can't find the right words to Google it. I have a fairly nice ...
-2 votes
2 answers
289 views

Specialized registration number [closed]

I’m looking for any kind of registration number on my late 1900’s specialized stumpjumper. Where do I find it and how to determine build date.
5 votes
1 answer
579 views

Help Me Identify My Uncle's Old Elevated Chainstay Bike

Please help me identify my uncle's old bike. I will greatly apppreciate all of you that willing to help mi. Thanks to all in advance who help!
2 votes
2 answers
643 views

Momentum and gyroscopic difference between wheel sizes

A common folk wisdom in mountain biking is that smaller wheels (like 26") are "quicker" or "more flickable" and "better for courses that require lots of speeding up and ...
0 votes
0 answers
47 views

SRAM 1:1 shifter + Shimano 11 speed MTB RD

I'm planning my next bike build with an 11-50 cassette but I don't want more than 10 gears for personal preferences. I've seen Chinese-brand drivetrains (LTWOO) that can do this but I want something a ...

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