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It takes 10 stacks to pop a MOAB (5 with Bigger Stacks), so each spike does 4x damage to blimps. With Spike Storm, this weapon can be extremely strong. However, do not rely on these for taking out MOABs because once the MOAB is popped, the child Ceramics will usually plow through the remaining spikes and make you lose.
In general, Spiked Balls and Spiked Mines are more useful in the early levels, but when MOABs start to show up, these are a must have, due to their final ability being the equivalent of 4 MOAB Maulers. This path is for MOAB-Class Bloons while the other path is for non-MOAB class bloons, meaning that it is best to alternate between Spiked Mines and MOAB-SHREDRs. MOAB-SHREDRs also produce 1.5x as much spikes as a normal Spike Factory with the Faster Production upgrade.
- When you buy this upgrade, the production of spikes doubles.
- SHREDR is a acronym for Super-Hard-Rending-Engine-Driven-Razor.
- The word SHREDR is played on the word 'shredder'. The 'de' between D and R is missing.
- In Bloons Monkey City, an Anti-MOAB Research Lab is required before researching this upgrade.