Ask a Bicycle Question - Part 5

[DigDub]

current ride.

 

[erwinrommel]

current ride.

Mind listing the specs?

I am curious about the Birdy cuz the stock parts are kinda average, but I always see very fast Birdy bicycles zipping around.

Tempted to get a Birdy and sell my Brompton, but the Birdy folding is still not as elegant and compact as Brompton.

 

[dilphinus]

Mind listing the specs?

I am curious about the Birdy cuz the stock parts are kinda average, but I always see very fast Birdy bicycles zipping around.

Tempted to get a Birdy and sell my Brompton, but the Birdy folding is still not as elegant and compact as Brompton.

I was doing research on which airlines carry bicycles foc and how to pack folding bicycles. Then found that the Brompton is small enuff to do a gate check.

 

[erwinrommel]

I was doing research on which airlines carry bicycles foc and how to pack folding bicycles. Then found that the Brompton is small enuff to do a gate check.

Thats the rationale for Bromtpon-designed dimensions.

The only 2 problems are that it is too heavy.

And more importantly, the Brompton gearing is very extreme. The gear increment, especially towards the higher gear, is shockingly huge.

 

[DigDub]

Mind listing the specs?

I am curious about the Birdy cuz the stock parts are kinda average, but I always see very fast Birdy bicycles zipping around.

Tempted to get a Birdy and sell my Brompton, but the Birdy folding is still not as elegant and compact as Brompton.

Its the alivio 2015 model. changes are:

. bottom bracket changed with crank to ridea
. changed wheel to 20" 406 sunrise sr3d with schwalbe durano tires, with ridea hubs and xtr cassette.
. changed handlebar to crank brothers 30mm carbon riser bar.
. changed seatpost to litepro carbon seatpost.
. changed saddle to fabric scoop radius.

weight is now 9.3kg.

used to ride a brompton m6r, the birdy is indeed faster and easier to ride. but brompton folds more compact and is easier to fold.

 

[dilphinus]

the guy is now thinking of swapping his parts for mine. My Dahon Speed P8 is pretty new. Rode it less than 10 times.

01. Shimano 105 RD
02. Shimano 105 FD
03. Tiagra 10 speed shifters
04. Shimano 105 C-brakes
05. Shimano 105 crank and dual chainrings 53/39T
06. Shimano 105 bottom bracket
07. Shimano 105 10 speed chain
08. Weinmann SEC16 451 rims with Kinetix hubs
09. Schwalbe Durano tires

Worth to do a swap?

 

[erwinrommel]

04. Shimano 105 C-brakes
.
.
.

08. Weinmann SEC16 451 rims with Kinetix hubs


Worth to do a swap?

What's your front O.L.D? Can fit?

Can your frame accept 451 wheels?

When upgrading to 451 with caliper brakes, I think its important to visualize whether it will affect the folding.

Folding with C brakes on a Tern (which folds using N-fold) will cause some issues. This video was done by one of the Ternout members.

If you don't plan to have c brakes, you may need v-brake extension to extend your current v-brakes to grip the larger 451 rims.

 

[dilphinus]

What's your front O.L.D? Can fit?

Can your frame accept 451 wheels?

When upgrading to 451 with caliper brakes, I think its important to visualize whether it will affect the folding.

Folding with C brakes on a Tern (which folds using N-fold) will cause some issues. This video was done by one of the Ternout members.


If you don't plan to have c brakes, you may need v-brake extension to extend your current v-brakes to grip the larger 451 rims.

My Speed P8 is stock.

I actually like the Marathon tire that I'm having now. Read reviews that it's better than the Durano. Well, the Marathon is for touring and that's what I'm going to do. Honestly I don't mind the swap ... but very reluctant to change the wheelset. Saves me money too.

 

[erwinrommel]

Its the alivio 2015 model. changes are:

. bottom bracket changed with crank to ridea
. changed wheel to 20" 406 sunrise sr3d with schwalbe durano tires, with ridea hubs and xtr cassette.
. changed handlebar to crank brothers 30mm carbon riser bar.
. changed seatpost to litepro carbon seatpost.
. changed saddle to fabric scoop radius.

weight is now 9.3kg.

used to ride a brompton m6r, the birdy is indeed faster and easier to ride. but brompton folds more compact and is easier to fold.

Very light and powerful bike.

Whats the gearing?

 

[erwinrommel]

My Speed P8 is stock.

I actually like the Marathon tire that I'm having now. Read reviews that it's better than the Durano. Well, the Marathon is for touring and that's what I'm going to do. Honestly I don't mind the swap ... but very reluctant to change the wheelset. Saves me money too.

Then don't change the wheelset. 451 tyres are very limited and are narrow-based. There's no marathon or other fat tyres available for 451.

And since you are not going to change to 451 wheels, then there's no need for C brakes, so it shouldn't affect the folding.

Just change the basic groupset (FD, RD, shifters, crankset, chain, cassette) if you really need it.

 

[DigDub]

Very light and powerful bike.

Whats the gearing?

front 53t, back is 11-32.

 

[erwinrommel]

front 53t, back is 11-32.

Should use Capreo.

More powerful.

 

[NoLogicLah]

Its the alivio 2015 model. changes are:

. bottom bracket changed with crank to ridea
. changed wheel to 20" 406 sunrise sr3d with schwalbe durano tires, with ridea hubs and xtr cassette.
. changed handlebar to crank brothers 30mm carbon riser bar.
. changed seatpost to litepro carbon seatpost.
. changed saddle to fabric scoop radius.

weight is now 9.3kg.

used to ride a brompton m6r, the birdy is indeed faster and easier to ride. but brompton folds more compact and is easier to fold.

Ur birdie hw muchie. I want to get 20" to ride with my frens.everytime take RB go meet them.like nt nice

 

[DigDub]

Should use Capreo.

More powerful.

capreo also 9 speed leh. and capreo cassette need to use capreo hub.

 

[DigDub]

Ur birdie hw muchie. I want to get 20" to ride with my frens.everytime take RB go meet them.like nt nice

birdy alivio 2015 is $2399. but default wheel is 18".

 

[erwinrommel]

capreo also 9 speed leh. and capreo cassette need to use capreo hub.

Yeah. I am not talking about the number of gears.

I am talking about 53/9 top gear ratio.

 

[DigDub]

Yeah. I am not talking about the number of gears.

I am talking about 53/9 top gear ratio.

oh yea. currently i'm comfortable with this gear ratio. if upgrade further i think i will change to xt 9 speed shifters and change the cables. but think won't upgrade for the time being since not much weight savings and shifting is not really essential.

 

[NoLogicLah]

birdy alivio 2015 is $2399. but default wheel is 18".

I want disc version leh. Disc version seems fun

buy liao most likely i will upgrade all components to Ultegra 2 x 11 spd lolz

boh moolah leh.

 

[DigDub]

I want disc version leh. Disc version seems fun

buy liao most likely i will upgrade all components to Ultegra 2 x 11 spd lolz

boh moolah leh.

birdy 2015 version all disc brakes liao, even the lowest spec model.

anyway, usually for foldies, road or mtb groupset better?

 

[MorningOwl]

is it cheaper if i build a bike than buying a whole complete bike?