08-09-2012, 07:59 PM
Hi, first post in this forum.
I don’t know if I’m posting in the right sub-forum so please let me know.
I have this bike:
It is a 2003 Raleigh SC-30; yes I know it is old, is ugly and I have to fix that flat tire.
I will like to get the help and feedback of this forum because I want to remove the front derailleur and chain rings [48-28t], leaving only one chain ring and replace the 7 speed [13-34t] freewheel (or cassette I don’t know which one I have), to a 9 or 10 speed. The catch is if it is possible to combine a chain ring and 9 or 10 sprockets in such a way that I can obtain the same combinations that I frequently use which are:
(48-13) – (48-15) – (48-17) – (38-17) – (38-19) – (38-21) – (28-24) – (28-34)
As you can see out of the “21 speeds” I’m only using 8. The 48-13 is inefficient at some speed, when going downhill so I know that I will like to start with an 11t sprocket.
I had visited 3 different LBS and the experience has not being too encouraging. They all basically want me to buy a new bicycle going from $450 up to $700. But when I ask what new bike model has one chain ring in front without a derailleur and a 9 or 10 speed cassette with the combination that I’m looking for, they told me that they don’t have such a thing followed by questions like “why do you want to do that?” and phrases like “that’s not needed”, “you should not do that”, etc., etc.
I know that I have to change not only chain rings and sprockets but I’m not looking to get the most exotic ultra-space age components; actually I want to replace the parts that are needed to be replaced by components that are not crap and better than the ones currently on the bike but not expensive either, like mid or better mid-low entry level if such a thing exists. Here are some close up pictures:
So looking at the pictures What have to be replace? Is this doable in an inexpensive way? What combination of single chain ring and sprockets should I get to obtain the combinations that I use must frequently? Ideas, comments, suggestions are all welcome.
Thanks!
I don’t know if I’m posting in the right sub-forum so please let me know.
I have this bike:
It is a 2003 Raleigh SC-30; yes I know it is old, is ugly and I have to fix that flat tire.
I will like to get the help and feedback of this forum because I want to remove the front derailleur and chain rings [48-28t], leaving only one chain ring and replace the 7 speed [13-34t] freewheel (or cassette I don’t know which one I have), to a 9 or 10 speed. The catch is if it is possible to combine a chain ring and 9 or 10 sprockets in such a way that I can obtain the same combinations that I frequently use which are:
(48-13) – (48-15) – (48-17) – (38-17) – (38-19) – (38-21) – (28-24) – (28-34)
As you can see out of the “21 speeds” I’m only using 8. The 48-13 is inefficient at some speed, when going downhill so I know that I will like to start with an 11t sprocket.
I had visited 3 different LBS and the experience has not being too encouraging. They all basically want me to buy a new bicycle going from $450 up to $700. But when I ask what new bike model has one chain ring in front without a derailleur and a 9 or 10 speed cassette with the combination that I’m looking for, they told me that they don’t have such a thing followed by questions like “why do you want to do that?” and phrases like “that’s not needed”, “you should not do that”, etc., etc.
I know that I have to change not only chain rings and sprockets but I’m not looking to get the most exotic ultra-space age components; actually I want to replace the parts that are needed to be replaced by components that are not crap and better than the ones currently on the bike but not expensive either, like mid or better mid-low entry level if such a thing exists. Here are some close up pictures:
So looking at the pictures What have to be replace? Is this doable in an inexpensive way? What combination of single chain ring and sprockets should I get to obtain the combinations that I use must frequently? Ideas, comments, suggestions are all welcome.
Thanks!