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@Andrew_H
Hi, a few things to start the post:
I promise I genuinely have searched the forum for an answer to my problem and there are very similar threads, however having read them all I am now more confused than before!
My first post was in the 'Newbie' section and explained the error of my ways concerning the (regrettable) purchase of a Create bike. It broke after one month, I don't want to talk about it! Let's just say it was an impulse buy and it was only intended to get to uni and back until I could afford something better. I am now in the possession of the below bike which I have only swapped over the wheels from the Create until I can afford something better.
I am no expert with all of this, so please go easy on me!
Rightyo, I apologise...this is going to be a long post!
I initially swapped over the chainset from the Create bike, this consisted of a 44t chainring and 165mm crank arms. The bottom bracket is now a cheap Shimano UN25 which is 110mm in length. I also have a Lasco chainset which I have tried (same spec as before) but have the same problem which I will explain.
The Create wheels have a flip-flop hub and the fixed cog is 17t.
The rear fork spacing is 130mm.
The chainline on the rear is 42mm. The front is 52.5mm.
This is how it looks with the above installed:
As you can all (hopefully) see, it is quite a way off.
The original chainset is a Sakae Roundtech 2. This fits perfectly and creates a perfect chainline (42mm on the front):
Am I right in thinking it's not possible to disconnect the chainrings and get shorter bolts due to how these are made?
So there is my problem. From what I can tell the Lasco chainset and Shimano bottom bracket cause a 10.5mm difference between the front and back. It looks as if I don't have enough space for a shorter bottom bracket. If I do, then would it be a 100mm bottom bracket and does it exist?
Alternatively I need a new chainset. This is quite hard to explain, but the spider on the Sakae sits in closer to the chainring compared to the Lasco causing a shorter distance between the middle of the tube and the middle of the tooth on the chainring. What would my options be for a new chainset?
Please bear in mind that I recently graduated from a very, very expensive Uni course (materials, printing etc.) and I am on a budget!
Again, please excuse the lack of technical knowledge and terminology, I am a beginner when it comes to all of this, but I am enjoying learning everything, slowly and painfully!
Any help and advice greatly appreciated.
Andrew