Praveen ~= Cycling

On Powercranks!!

2010-08-31T22:01:00.000+05:30

At last took a plunge into Powercranks! How is I got them is not a happy story. These are very expensive ~$900 for the basic ones. So, I bought them off ebay. The seller had ISIS BB along with it. I always trusted ebay sellers and had not had any problem till now. This time I learnt a $ lesson. My friend was visiting me, so I got them shipped to him. When I got it in my hands I found the BB was bent. :( I don't mean to complain with ebay in general but my first bitter experience.

Obviously, my search for the ISIS BB started. I was bewildered with the rant I found on net. It seems this open standard, ISIS, was created because of the patented octalink BB by Shimano. I hardly came across anyone who had good experience with any brand but SKF. The roller bearings on drive side and ball bearings on the non drive side really got me interested. Alas, it didn't last long. I could not find any online retailer but Vintage Bicycle Press with stock, but they were also vacation. With all the warnings I read on net, I still went ahead and brought FSA Mega Pro.

I really wanted to post video of how installed BB and the PC but I could not get a good video. I need a tripod for my camera, so forget.

It has been just two days I installed them on my bike. My experiences are not different from here (search for powercranks). I could not keep up them in place and rhythm, even for a minute. It was very disappointing. I tried being hero for 5 minutes, lived up to self. Then came the ego hurter, I could not lift my legs to get down the bike. I enjoyed the pain in muscles next day. :) I plan to slowly increase my time on them.

Now that I have every thing I need for my training, I plan to start training soon. I plan to put them here. It will go this way; base period, build period. I don't intend to race, but I want to see what my potential is!

Powertap Wheel build

2010-08-19T12:40:00.001+05:30

Is this yet another wheel build blog? No, this is my first wheel build. Like said, necessity is mother of inventions. It is very expensive to ship a built wheel to India. I ended up building my first wheel, rear wheel.

Again, I had to wait for Sudhanshu to get me Powertap Pro+, Kinlin XR300 and Sapim CX ray. Yes, it is very expensive to meet him.
Wait, is that all you need to build a wheel?
No.
i)Tools. Truing stand (Litespeed Classic), dishing guage (Parktool WAG-4), spoke wrench (Parktool SW-10) and tension meter (Parktool TM 1).

There are wide range of truing stands in the market starting from insanely expensive to affordable. In case I buy a truing stand, I would go for Park Tool TS-2 with Dial Indicator Guage Set
ii) ~~Read~~Study. The book 'The Bicycle Wheel' by Jobst Brandt, here and here. The book is an excellent one and I recommend it.

Did you miss the spoke holder for holding the bladed spoke?
No, I used pliers wounded with pvc tape.

Is that tension meter necessary?
Good question. If you search the net, you see holy war on whether to use it or not. This made sense to me. So, I used it and recommend it.

Before I get into how I built it, let me explain how I chose my spoke length. It very interesting and simple concept how to calculate the spoke length. The three images below show 1X, 2X and 3x laced wheel. Lacing is the number of a trailing spokes a leading spokes crosses through. However, what you see here is only one flange laced.

To start with, imagine flange and the rim on the same plane.
1X laced Wheel.

2X laced Wheel.

3x laced Wheel.

Yes, you don't see with 90 degree angle at spokes, this is just for example sake.

Consider the bright blue triangle to solve for imaginary spoke length, S'.

R, ERD of the rim.
r, radius of the hub, from center to spoke hole center.
L_c, lacing.
S_c, Spoke holes on flange; Half of total spokes.
θ, Angle subtended.

θ = 360 * L_c / S_c; This should be clear from above pictures.

Now, there are two ways to solve for the spoke length.
The first method (i), using the law of cosines.
s'² = r² + R² - (2 * r * R * cos θ ); I later found this is how the spoke length calculates it.

The second method (ii), using Pythagors theorem
x = r * sin θ; y = r * cos θ
s'² = x² + (R - y)²
    = (r * sin θ)² + (R - (r * cos θ))²;  This is how spocalc calculates it.

Lets now come to reality. Flange and rim don't lay on the same plane, flange is away from the plane of the rim and also they are not equidistant from the center of the hub. For the sake of discussion here, consider one flange. The isometric view of build wheel is something like this. It is not complete view but drawn(not a cad drawing) for what is required.

Use Pythagoras theorem to solve for spoke length, S.

W = Distance from the center of the hub to flange.
s² = s'² + W²

Here, it is considered that spoke holes on rim are at the center of the rim. In case you end up with a rim that has offset spoke the effective 'W' is reduced by the offset, i.e."W - S_o",

s² = s'² + (W - S_o)²
Using method (i),
   = r² + R² - (2 * r * R * cos θ ) +
    (W - S_o)²

Using method (ii)
   = (r * sin(360 * La / S_c))² +
     (R - (r * sin(360 * La / S_c)))² + 
     (W - S_o)²

With the spoke length calculated, start with the building wheel. I don't need to copy+paste WWW here. There are numerous articles on how to build a wheel. Every one of them has worked for me. Sheldon Brown's page is where you start and end. Jobst Brandt's book does it step by step with figures. So, go figure out. How I used my bike as truing stand is
+ Stand the bike upside down.
+ With the current wheel keep tighting the brakes untill both rub the wheel. There you got the brakes as a reference to where the new wheel should be centered. Now, remove it and put the new wheel that is to be trued. So, I didn't have to fiddle much with my Parktool WAG-4. A scale/ruler attached with rubber bands to the seatstays served a reference to the radial truing.
+ Complete the build as explained here.

Happy wheel building!!

An ancient bike, from Den Gamle By, Århus, Danmark

2010-07-01T17:05:00.001+05:30

Okay, the photo doesn't do the justice!

First look at Speedplay

2010-05-29T18:27:00.000+05:30

Every time I plan small upgrade, I end up with much more. I was moving from triple to double setup but also ended up with Speedplay zero stainless pedals. Here is what is in the box.

It is necessary to read the installing instructions along with warnings or else you might end up damaging them. It was very easy installing them on my three hole Merida Carbon sole shoes.

I had damaged my first SPD cleats, from occasional walking. See the difference between not using and using cleat covers.

Since then I always use cleat covers. I bought coffee caps, cleat covers from Speedplay. Kool Kovers also makes covers for Speedplay. My earlier SPD cleat covers are from them. Don't expect to jog with them! They are good enough for short walk. Also, Speedplay's cleats need to lubed, so, covers help protect them.

What I like about Speedplay is ->
Adjustable float on both directions(in and out). Notice the arrow, they can be turned to get convenient float. Anyways, as you see my preference is zero float.

Two more thinks I feel with Speedplay are;

1. SPDs are wider than Speedplay, comfortable ground contact area.

2. With Speedplays I feel like 'heel' in the front. Those caps give large surface area, easy walking.

I definitely need covers!!

Buying and Shipping from ebay!!

2010-04-21T16:04:00.010+05:30

There are few shops that stock high end bicycles, in Bangalore, but not many high-end components. I always first check with Venkatesh before I order stuff from ebay. He is a frequent visitor to Singapore and he might get that for you.

Though there are no problems with buying stuff from ebay, just need paypal account, the shipping process is not very pleasant experience IMO. Most of the sellers use USPS to ship internationally. Before I get into that, here is the general information on Bangalore Customs. Any ~~post~~parcel that lands in India first has to go through the Postal Appraising Department. Here is the procedure followed by Postal Appraising Department for parcel, same content here also.

"Every thing looks so simple, what is your problem?". Delay! I don't take any chances and always use USPS Express mail. It has a tracking number. Although the USPS website updates with "Out of Foreign Customs" I don't receive my parcel. It is still stuck in customs. It usually takes a week. The procedure is manual after it enters PAD. I find big ledgers where they keep track of all the parcels. Here is where the human error creeps in. When they say "In cases where the details available with the parcels are not sufficient for assessment, a call memo is sent to the addressee requesting them to produce necessary documents for assessment of the goods.", they mean the addressee is contacted by sending postcard, oops.. the person in-charge forgot to send the postcard! So, I have to call them couple of times to check the status, find the contact information on PAD site. After producing those necessary documents, EMS of India Post delivers your parcel.

"If delay is your problem, why don't use expensive DHL?" For two reasons, it gets expensive to ship small things, like derailleur, and many sellers on ebay don't entertain DHL. In past, shipping by DHL, I have received them the very next day it lands in India. Yes, the other option is to use a mail/parcel forwarding service like Bongo. Bongo ships via DHL. After going thr' the rates/charges of a few forwarding services, I found Bongo VFM. I'm quite happy with it. They have very good web interface and + is that they have fast+prompt replies.

There was a discussion on Bikeszone about duties and taxes applicable in India. Below calculator is based on that information and the usual disclaimer. Talk to any CA to get exact value.

Disclaimer: The calculated duties and taxes are not exact.

Value of goods:     VOG:
          Custom Duty:     CD :% VOG         
 Counter Vailing Duty:     CVD:% (VOG + CD)  
          Cess on CVD:    CCVD:% CVD         
 Cess on Total Duties:     CTD:% (CD + CVD)  
Additional Customs Duties: ACD:% all of above

Taxes + Duties Payable:

Edit 28May10: Duties receipt from Fedex that show above calculations.

For complete info on taxes and duties visit www.cbec.gov.in

Off underwear!

2010-04-14T09:59:00.000+05:30

For the first time in my life, I haven't been with underwear for an hour or so. Probably everyone now knows, Bangalore was hottest in 25 years on 12Apr10.

I was never without underwear except while bathing. After riding for little more than an hour, as usual, my underwear was dripping with sweat. It caused enough of chafing to rest for the next day. This was in the evening b/w 6 and 7'o clock, it was that hot! Thanks to AC in neighbor hood, vehicular pollution and more thanks to BBMP for chopping many more trees. So, I'm on just biking shorts since then.

I like+happy with my ISM saddle but my short's padding don't match the ISM design. I had to put back the old San Marco. Now, I wonder if there are any shorts with padding wide enough to cover the wide ISM race saddle?

On Rollers

2010-02-21T15:32:00.015+05:30

It not very difficult to get on bike on rollers but support is needed. I use window sill for support while getting on and also when I lose balance talking to my daughter.

It has been close to six months since my bike is IDLE. I had to rest for couple of months owing to keen pain and then another couple while away on a business trip. The wear here is result of riding for a mere half-an-hour.

No insane hero-ism until I get used to rollers. A stack of beds also, for support.

Goodbye Tube!!

2009-12-24T13:59:00.004+05:30

Broken Presta valve of my Litespeed's tube.

From Litespeed

Now, the tube can be re-used for fixing puncture.

My first ride to Nandi Hills from Bangalore

2009-03-30T22:29:00.007+05:30

Can it be guessed what happens if you ride in mist like this?

First time in my life, I saw something like this happens!! Droplets of water condensed on hair on my hand.

First Solo Ride on NICE Road, Bangalore

2009-01-03T00:57:00.009+05:30

My ton of thanks to Sudhanshu for getting me this bike from US and to Richard for agreeing to sell me his bike.

Litespeed on Bangalore-Mysore NICE road.

I have started weekend rides but this is my first solo. I like the NICE road for it is less polluted and has very less traffic. Though I miss trees I don't have complaints. Few pics from CameraPhone, just to give an idea what NICE road is.

For some reason, which I don't understand, this road is not yet on google maps. Anyways, this post was not to give you complete details of my ride. I'll soon find a GPS and a good cyclocomputer to post complete details about my ride. It has just started with some silly 60km. I plan to make it serious rides going further.

Suggestions on GPS with Cyclocomputers are welcome.
--Thanks.
[Edit:05Apr10] This toll road is closed now, in fact long back.

My Commuter

2008-07-14T20:25:00.003+05:30

March 2007, sold my two years old Thunderbird to get back to cycling. With all the options I had in March, I brought, unwillingly, Hero Thunder MTB. I wished for Hero Thunder Racer, got misguided that it's production has stopped. Life's going on.

Jan 2008, My Office is just 2km from home. I have to stop at least twice at the signals. External gear is not for this kind of commute, finally decided to buy a internal hub gear. Coincidently, my in-law were returning from U.S and they got me a Shimano Nexus-8. I understand that the kind of gear ratios don't suit MTB but I didn't want to go for a new bike. So using it on my MTB. I plan to upgrade to a urban bike later.

What I need is an Urban bike with 700c wheels, internal hub gear, hub dynamo(not generator) and with carrier. I wish for such an urban bike.

My first post on this blog.

2008-03-24T21:41:00.000+05:30

"I do the very best I know how - the very best I can; and I mean to keep doing so until the end. If the end brings me out all right, what's said against me won't amount to anything. If the end brings me out wrong, ten angels swearing I was right would make no difference." Abraham Lincoln
What a great quote that gets right attitude in life! One of the most inspiring quote for me.