Shimano twist grip shifter on Apollo Neo 6 girls bike. I bought this bike 6 months ago for my 7 year old.
After getting it serviced at 99 Bikes the shifter was so stiff my daughter couldn’t change from the 2nd gear into the first. Took it back & the mechanic checked it & said it was normal. I insisted on him replacing the gear cable but… no change. I flooded the handlebar twist grip with lube but no change. Went back to the shop and the same guy said nothing wrong and that’s how those shifters work. I demonstrated that my daughter couldn’t access the first gear. Seriously, it requires a very firm grip and a firm twist even for an adult. Now I’m quoted $100 to replace the shifter with a thumb shifter. My daughter is normal strong for a kid. Is this a design fault or a mechanic needing replacement?