Crank arm removal

[EMTBSEAN]

I would like to renew my outer and inner shifter cable on my Whyte e150rs which is internally routed but I need to remove the crank arm on the NON drive side to remove the plastic motor cover, does anyone know how to do that, do I need a special tool, any help greatly appreciated please

 

[Mikerb]

Identify the crank type....Park Tools videos on YT will help you do that. If it is self extracting no special tool needed. Otherwise you need a crank extraction tool...cheap enough.

 

[EMTBSEAN]

Sorry about that Mike, it’s a Sram crank, if it’s of any help I could take some pictures.

 

[EMTBSEAN]

Here’s a picture of my crank arm guys, the black cap is a 10mm allen cap with an 8mm Allen nut underneath if that’s any help please

 

[KennyB]

Looks like auto-extract bolt to me. Just use an Allan key on the inner bolt, undo maybe a half turn, you feel resistance and keep going. It can be tough to get it undone so I have the bike on its wheels, stand on the RHS, and lean over so I can push down on the crank arm with my left hand and the Allan key with my right.

 

[Mikerb]

Yep agreed...its self extracting. The inner bolt is the extractor ( so you use that one). The outer is the bolt the extractor pushes against to draw the crank off the spindle.

 

[EMTBSEAN]

Oh right, I had to read both the last posts a couple of times to let it sink in but I get what you’re both saying, I’ll get a new inner and outer shifter cable and tackle that myself, very much appreciate you both taking the time to explain to the bike ‘o’ phobe (me)?