right after i got myself a rigid steel 29er, some folks here who are not so familiar with 29ers, would comment: "this thing is heavy to ride uphill!"
they might have misunderstood. maybe it is heavy, when equipped with the gearing of 26" wheel, since 29er has bigger diameter than 26.
so i searched the net, and found some nice threads about low gearing for 29ers.
i am aware that one option is to get the 11-36t cassette sprockets.
but i am a cheapskate. so i looked the other way. i looked at the option of putting a smaller chainring.
at the local market, someone is selling new old stock 42-32-20 crankset. $40. but still it's expensive for me.
and then i found a thread of 20t chainring conversion.
wow. stambeco mountain goat 20t. actiontec. still expensive.
so i decided to make my own.
took a $1 20t steel cog. ground the teeth manually to make it thinner to accomodate 8sp chain. drilled 4holes bcd64(?). and put that on my existing $20 FSA crankset, replacing the 22t.
there were some more grinding of the spider to give more chain clearence, just like it was explained in the 'stambeco 20t chainring conversion' thread.
voila! now i have low gearing of 17 gear inch. 20t chainring with the 34t sprocket.
17 gear inch on my rigid steel singular swift.
thank you all for your inspirations on the internet!