Mountain bike modification help needed

ditzy SG

Do you think its appropriate to have a 26" wheel in front and 24" wheel at the rear? Laughing

spidey3 SG

and i also wonder whether Brembo got make brakes for bicycle or not.

Wanda SG

Interesting....i have thot of doing the same to my mtn bike, but did not explore.

I would also like to have a 24" wheeled bike, easy for running errands and marketing (will then need to attach a basket), altho' a bit gu niang. Laughing

spidey3 SG

no lah. Bicycle is all RWD. Not appropriate to have smaller back wheel. Difficult to drift.

ditzy SG

Drift on a bicycle? Are you out of your mind? Laughing

Wanda SG

Were you really thinking of 24" in front and 26" at the back? Shocked

Like that also can? Laughing

spidey3 SG

I was considering 24" back and front. I was just humoring ditzy Laughing
You were saying you have a bike, I assume also 26". So how tall are you if I may ask? Do you have problem with the height of the bike?

icYwATeR SG

This is good enough liao
[img=http://img516.imageshack.us/img516/9695/gtav15part6ne.th.jpg]

Wanda SG

It not about the wheels mah...it's about the bike frame size. Like someone mentioned, gotta choose the bike with sufficient standover height, i.e. at least 1" space between the top tube and the groin area.

I'm less than 1.6m, and my bike frame is about size 15 (not very easy to find though)....yes, with 26" wheels, as per normal mtn bike.

photo_seeker SG

Really not advisable. Have to change pratically everything. Resign to fate. Mine also slightly higher.

JasonC SG

Bottom line is, you cannot simply change the wheel sizes. as mentioned earlier, most frames are built specifically for a certain wheelsize only (there are some which have adjustable brake bosses, but that's a different story)

it appears that your friend bought a frame that is too large for her; which is pretty unethical of the salesperson, whom should have known better than to recommend the particular frame to her.

I'd advise that you get your friend to change to a smaller frame ( typically, most ladies will be comfortable with a 14"-16" frame.

PM me if you need assistance with that.

icYwATeR SG

aiya behind change to smaller diameter one,than remove the brake can liao
i mean behind that one

mase101 SG

Well from what I know, you need not have to change the cassette(gears) because if changing the size meaning changing the diameter of the rim and length of the spokes. Not sure about the hub which holding the cassette though. I ain't a wheelbuilder. Contact reputable bikeshop for more professional assistance.

JasonC mentioned about changing of frames and it seems like good idea.

Not that I have anything against icYwATeR but removing the brake isn't a good solution and its dangerous especially on the streets of Singapore.

Smile

spidey3 SG

yes I do feel the salesperson had not given a good service. Though he had not pressure her into the sales I do think he could have done more in his giving us an expert advice.

The bike she bought had a frame of 17". The top tube is slightly slanted towards the seat (and not totally horizontal) giving it a bit of a woman bike look. Still when she stands just above the top tube, she has to tip toe. There is no 1" clarence as mention by Wanda.

She went for it because she is pretty sure height will not be a problem for her. She has been riding bikes since a young age and has said that she even has no problem riding adult bike when she was in primary school. But that is on even tarmac. I just think she will have problem on a dirt or hill track - which we hope to try out.

We bought the bike but it is not delivered yet. So I think there is still a possibility to change it. But the thing is there is not many other option.

spidey3 SG

changing frame. I don't know. Form what I see - I think the frame is the most expensive component for this bike. It is a 6061 aluminium frame. Very light but solidly built.

Removing the brakes Laughing It is like chopping of the head to cure a headache.

About the hub to hold the cassette - this component (hub) you are saying is specific to the wheels. So that the hub of one wheels will not fit another type of wheel.

photo_seeker SG

I think it’s better to change. But my friend she’s riding my bike and coping well though.

spidey3 SG

Hi JasonC,
Thanks for the help.
You do seem to have a bit of knowledge in this subject on mountan bike.
Can a road bike use a moutain bike type tyres?

icYwATeR SG

you want brake oso can
behind one disk brake loh

Wanda SG

Better change to a smaller bike, since you've not taken delivery yet, esp. if she has to tip toe - it's very tiring to have to tip toe whenever you stop at the traffic lights, etc, and a bit risky unless she's a very confident rider.

I could cope with a 17" bike (before I had my own bike), but a bigger frame means heavier weight and a less comfortable feel in manouvering (sp?). So go for a smaller frame that suits the lady's height.

icYwATeR SG

Road bike use mountain bike tyres
can meh?

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