FLAT MTB SPIKE KIT

Bought these to replace spikes for when riding on road. They work perfectly, but be sure to use the included wrench, the bolts will back out if only finger tight. I suggest a little Loctite as well.

Bought these because one unscrewed and fell out at some point in the first dozen rides with a new pair of shoes. That was disappointing, but with shipping needing to pay more than $22 -- more than 10% of the cost of the shoes — for this $1 part is much more disappointing.

What can I say they screw in. I would give them a five but two of them unscrewed and fell out.