Ask a Bicycle Question - Part 5

[tremor]

Mountain bike fork sexpert come in.

My fox 32 talas R don't rebound up anymore. Only when I get off the bike then it will rebound back. I pump air to 135psi as recommended into the fork Liao. What is wrong? Is it due for servicing? Change oil etc?

Who can service fork? I live west side.

Anyway I found out that kian hong and also gravity racing do fox servicing.

I will be going to gravity cos hopefully their turnaround Is faster.

 

[Jamesyue]

hi hi any expert know where can i buy a very basic entry level fat bike? budget around 250 to 300 dollars thanks

 

[erwinrommel]

Assuming same power in watts it will be the bike which is the most aero and the lightest bike

Sent from Asus ASUS_T00P using GAGT

How about the gearing system?

Internal gear hubs use planetary gears. I am unsure if this created more friction and lead to loss in efficiency.

 

[erwinrommel]

Just curious...

How many people here use oval chain ring? And what brand would you recommend?

 

[DigDub]

Just curious...

How many people here use oval chain ring? And what brand would you recommend?

ridea?

 

[Jay Bee]

OK I have a question to ask about derailleur and internal gear hub.


Suppose I have the following scenario:

Same bike model assuming both have similar weight..

A: x gear inches using cassette derailleur system
B: same x gear inches using internal gear hub (not at direct drive... e.g. 133%)

Which bike will go faster using same pedaling power?

Another scenario:

A: x gear inches using cassette derailleur system
B: same x gear inches using internal gear hub (at direct drive... e.g. 100%)

Which bike will go faster using same pedaling power?

assuming same energy input, derailleur will be faster, until it becomes dirty enough to lose more efficiency vs gear hub.

 

[rarenick]

Just curious...

How many people here use oval chain ring? And what brand would you recommend?

Reminds me of shimano biopace which i had on my sold away road bike. This is not a recommendation though.

Sent from Xiaomi MI 4I using GAGT

 

[rarenick]

I read online that internal gear hub will lose a bit of efficiency. But for me neat and clean is more important. So my vintage bike got an 8 speed igh, but mtb is 10 speed at the back.

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[Jay Bee]

I read online that internal gear hub will lose a bit of efficiency. But for me neat and clean is more important. So my vintage bike got an 8 speed igh, but mtb is 10 speed at the back.

Sent from Xiaomi MI 4I using GAGT

actually imho, shouldnt affect much...... unless the rider uber strong

 

[erwinrommel]

I read online that internal gear hub will lose a bit of efficiency. But for me neat and clean is more important. So my vintage bike got an 8 speed igh, but mtb is 10 speed at the back.

Actually an internal gear hub on a vintage bike looks really cool..

Planning for my next upgrade on my brompton...

 

[proproboy]

Looking to get into the cycling hobby. Considering getting an entry level hard tail mountain bike/ hybrid bicycle. Budget around $300. Any recommendation for a suitable bicycle or reputable bicycle shop in the north. Open to second hand bicycles as well! Thanks in advance

 

[tremor]

anybody bought from http://www.thebikeshop.de before?

Some items quite cheap wor.

 

[Sadisticnoob]

How about the gearing system?

Internal gear hubs use planetary gears. I am unsure if this created more friction and lead to loss in efficiency.

hmm. think there was a very old study conducted

http://www.ihpva.org/HParchive/PDF/hp52-2001.pdf

the deraileur drivetrain has an efficiency of 4% more or so, aka transfer more power.


but it is very minor especially at low speeds

 

[Sadisticnoob]

mounted old saddle from road bike and handlebar tape from ambrosio (cheap!)

 

[erwinrommel]

mounted old saddle from road bike and handlebar tape from ambrosio (cheap!)

Your dropbar is pretty low...

 

[Citiguy]

I suppose the last guy who rubbed his braking surfaces liberally with it didn't live to tell us how effective it was, so...

/Dan

Hahahahaa, of course not on the wheels lah...

 

[Citiguy]

Used to do it some years back. Also heard that teflon thing somewhere. Not sure if the teflon thing really works as in preventing new dirt from sticking on the frame though. But had not done it for sometime liao. But so far, had not observed any adverse effects. Btw, I spray the GT85 onto a piece of cloth in order to have control on where the GT85 goes and wipe only the painted frame only. I treat that as a quick fix way of cleaning the frame and hopefully have less dirt sticking onto it. For more detailed work, I wash the bike and applied car wax over the painted parts of the frame.

Had not done it ever since I got myself the Finishline Showroom Polish and Protectant. But I also avoid getting that stuff going onto the brake components too.

Yes, I sprayed it onto a cloth and applied it to the frame.

 

[Citiguy]

only use car wax..

Don't use lubricant on frames

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Oh! May I know why, Sadisticnoob? It is that it will etch the paintwork/lacquer?

 

[Cryogenist]

Oh! May I know why, Sadisticnoob? It is that it will etch the paintwork/lacquer?

I think lubricant easily attract dust, just like how chains will become black over time.

 

[Sadisticnoob]

Oh! May I know why, Sadisticnoob? It is that it will etch the paintwork/lacquer?

I think lubricant easily attract dust, just like how chains will become black over time.

yes, its shiny because of the oil.

rather use wax, at least it will be waterproof for awhile